Publications of massive stars group



2017 2016 2015 2014 2013 2012
2011 2010 2009 2008 2007 2006
2005 2004 2003 2002 2001 2000
1999 1998 1997 1996 1995

Publications 2017

M. Martinez-Chicharro, J. M. Torrejon, L. Oskinova, F. Fürst, K. Postnov, J.J. Rodes-Roca, R. Hainich, A. Bodaghee: 2017, MNRAS (in press) - arXiv:1710.01907 (6 pages)
Evidence of Compton cooling during an X-ray flare supports a neutron star nature of the compact object in 4U1700-37

R Ignace, K T Hole, L M Oskinova, J P Rotter: 2017, Astrophys. J. (in press) - arXiv:1710.05764 (10 pages)
An X-ray Study of Two B+B Binaries: AH Cep and CW Cep

E. Bozzo, L. Oskinova, A. Lobel, W.-R. Hamann: 2017, Astron. Astrophys. (in press) - arXiv:1710.01877 (5 pages)
On the super-orbital modulation of supergiant high mass X-ray binaries

E. Bozzo, F. Bernardini, C. Ferrigno, M. Falanga, P. Romano, L. Oskinova: 2017, Astron. Astrophys. (in press) - arXiv:1709.00716 (19 pages)
The accretion environment of Supergiant Fast X-ray Transients probed with XMM-Newton

Ramiaramanantoa, Tahina; (...) Shenar, Tomer; et al.: 2017, MNRAS in press (44 pages) - arXiv:1710.08414
BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant ζ Puppis unveils the photospheric drivers of its small- and large-scale wind structures

Richardson, Noel D.; (...) Shenar, Tomer; et al.: 2017, MNRAS 471, 2715 (16 pages) - arXiv:1707.03390
The variability of the BRITE-est Wolf-Rayet binary, γ2 Velorum I. Photometric and spectroscopic evidence for colliding winds

Varsha Ramachandran, R. Hainich, W.-R. Hamann, L. M. Oskinova, T. Shenar, A. A. C. Sander, H. Todt, J. S. Gallagher: 2017, Astron. Astrophys. (in press) (27 pages) - arXiv:1708.05088
Stellar population of the superbubble N206 in the LMC I. Analysis of the Of-type stars

T. Shenar, L. M. Oskinova, S. P. Järvinen, P. Luckas, R. Hainich, H. Todt, S. Hubrig, A. A. C. Sander, I. Ilyin, W.-R. Hamann: 2017, in: Proceedings of a conference held in Brno (in press) (5 pages)
Constraining the weak-wind problem: an XMM-HST campaign for the magnetic star HD54879

T. Shenar, L. M. Oskinova, S. P. Järvinen, P. Luckas, R. Hainich, H. Todt, S. Hubrig, A. A. C. Sander, I. Ilyin, W.-R. Hamann: 2017, Astron. Astrophys. (in press) (13 pages) - arXiv:1708.01261
A combined HST and XMM-Newton campaign for the magnetic O9.5V star HD 54879: towards constraining the weak-wind problem of massive stars

Andreas A.C. Sander, Felix Fürst, Peter Kretschmar, Lidia M. Oskinova, Helge Todt, Rainer Hainich, Tomer Shenar, Wolf-Rainer Hamann: 2017, Astron. Astrophys. (submitted) - arXiv:1708.02947 (16 pages)
Coupling hydrodynamics with comoving frame radiative transfer: II. Stellar wind stratification in the high-mass X-ray binary Vela X-1

P. Padovani; ...; L. Oskinova; et al.: 2017, - arXiv:1705.06064 (70 pages)
ESO-Athena Synergy White Paper

Ignazio Pillitteri, Scott J. Wolk, Fabio Reale, Lida Oskinova: 2017, Astron. Astrophys. 602, A92 - arXiv:1703.04686 (10 pages)
The early B-type star Rho Oph A is an X-ray lighthouse

Graciela Sanjurjo, Jose Miguel Torrejon, Konstantin Postnov, Lida Oskinova, Jose Joaquin Rodes-Roca, Guillermo Bernabeu: 2017, Astron. Astrophys. J. (submitted) - arXiv:1706.04907 (12 pages)
XMM-Newton spectroscopy of the accreting magnetar candidate 4U0114+65

A. Gonzalez-Galan, L. M. Oskinova, S. B. Popov, F. Haberl, M. Kuehnel, J. S. Gallagher III, M. P. E. Schurch, M. A. Guerrero: 2017, Monthly Notices Roy. Astron. Soc. (in press) - arXiv:1706.05002 (16 pages)
A multi-wavelength study of SXP 1062, the long period X-ray pulsar associated with a supernova remnant

R. Hainich, L. M. Oskinova, T. Shenar, P. Marchant, J. J. Eldridge, A. A. C. Sander, W.-R. Hamann, N. Langer, H. Todt: 2017, Astron. Astrophys. J. (submitted) - arXiv:1707.01912 (25 pages)
Observational properties of massive black hole binary progenitors

L.M. Oskinova, D.P. Huenemoerder, W.-R. Hamann, T. Shenar, A. A. C. Sander, R. Ignace, H. Todt: 2017, Astrophys. J. (in press) - arXiv:1707.04473 (18 pages)
On the binary nature of massive blue hypergiants: high-resolution X-ray spectroscopy suggests that Cyg OB2 12 is a colliding wind binary

Sander, Andreas A. C.; Hamann, Wolf-Rainer; Todt, Helge; Hainich, Rainer; Shenar, Tomer: 2017, Astron. Astrophys. 603, 86 - arXiv:1704.08698
Coupling hydrodynamics with comoving frame radiative transfer: I. A unified approach for OB and WR stars

Toala J.A., Oskinova L.M., Ignace R.: 2017, Astrophys. J. 838, 19 (6 pages) - arXiv:1703.04059
On the Absence of Non-thermal X-Ray Emission around Runaway O Stars

Schoeller, M; ...; Oskinova L.M.; ...: 2017, Astron. Astrophys. 599, 66 (12 pages) - arXiv:1611.04502
B fields in OB stars (BOB): Concluding the FORS 2 observing campaign

Almeida, L.A.; ...; Shenar, T; et al.: 2017, Astron. Astrophys. 598, A84 (36 pages) - arXiv:1610.03500
The Tarantula Massive Binary Monitoring. I. Observational campaign and OB-type spectroscopic binaries

Shenar, T; ...; Todt, H.; Hamann, W.-R.; Oskinova, L.M.; Sander, A.; et al.: 2017, Astron. Astrophys. 598, A85 (16 pages) - arXiv:1610.07614
The Tarantula Massive Binary Monitoring project: II. A first SB2 orbital and spectroscopic analysis for the Wolf-Rayet binary R145

Oskinova, L.M.; Ignace, R.; Huenemoerder, D.P: 2017, in: Proceedings of the IAU Symposium No. 329 "The lives and death-throes of massive stars" (in press) (5 pages) - arXiv:1702.05613
X-ray diagnostics of massive star winds

Kretschmar, P; ...; Oskinova, L.M.; ...; Sander, A; et al.: 2017, in: Proceedings of the IAU Symposium No. 329 "The lives and death-throes of massive stars" (in press) (4 pages) - arXiv:1702.06744
Stellar Winds in Massive X-ray Binaries

Hamann, W.-R.; Oskinova, L.; Todt, H.; Sander, A.; Hainich, R.; Shenar, T.; Ramachandran, V.: 2017, in: Proceedings of the IAU Symposium No. 329 "The lives and death-throes of massive stars" (in press) (5 pages) - arXiv:1702.05629
Massive stars in advanced evolutionary stages, and the progenitor of GW150914

Sander, Andreas A.C.: 2017, in: Proceedings of the IAU Symposium No. 329 "The lives and death-throes of massive stars" (in press) (8 pages) - arXiv:1702.04798
Recent advances in non-LTE stellar atmosphere models

Hainich, R.; Shenar, T.; Sander, A.; Hamann, W.-R.; Todt, H.: 2017, in: Proceedings of the IAU Symposium No. 329 "The lives and death-throes of massive stars" (in press) (8 pages) - arXiv:1703.02060
The metallicity dependence of WR winds

Leto, P.; Trigilio, C.; Oskinova, L.; Ignace, R.; Buemi, C. S.; Umana, G.; Ingallinera, A.; Todt, H.; Leone, F.: 2017, MNRAS (in press) (15 pages) - arXiv:1701.07679
The detection of variable radio emission from the fast rotating magnetic hot B-star HR7355 and evidence for its X-ray aurorae

Martinez-Nunez, S., (...), Oskinova, L.M., (...), Sander, A., et al.: 2017, Journal of Space Science Reviews (98 pages) (in press) - arXiv:1701.08616
Towards a unified view of inhomogeneous stellar winds in isolated supergiant stars and supergiant high mass X-ray binaries

Postnov, K.; Oskinova, L.; Torrejon, J. M.: 2017, MNRAS 465, 119 (6 pages) - arXiv:1610.07799
A propelling neutron star in the enigmatic Be-star γ Cassiopeia

Postnov, K.; Oskinova, L.; Torrejon, J. M.: 2017, in: Proc. 11th INTEGRAL Conference Gamma-Ray Astrophysics in Multi-Wavelength Perspective, 10-14 October 2016, Amsterdam, The Netherlands (9 pages) - arXiv:1701.00336
Low-luminosity stellar wind accretion onto neutron stars in HMXBs

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Publications 2016

Aldoretta, E., (...), Shenar, T., (...): 2016, Monthly Not. Roy. Astron. Soc. 460, 3407 (11 pages) - arXiv:1605.04868
An extensive spectroscopic time-series of three Wolf-Rayet stars. I. The lifetime of large-scale structures in the wind of WR 134

Bozzo, E.; Oskinova, L.; Feldmeier, A.; Falanga, M.: 2016, Astron. Astrophys. 589, A102 - arXiv:1603.05187 (11 pages)
Clumpy wind accretion in supergiant neutron star high mass X-ray binaries

A. Gimenez-Garcia, T. Shenar, J. M. Torrejon, L. Oskinova, S. Martinez-Nunez, W.-R. Hamann, J. J. Rodes-Roca, A. Gonzalez-Galan, J. Alonso-Santiago, C. Gonzalez-Fernandez, G. Bernabeu, A. Sander: 2016, Astron. Astrophys. 591, A26 - arXiv:1603.00925 (25 pages)
Measuring the stellar wind parameters in IGR J17544-2619 and Vela X-1 constrains the accretion physics in Supergiant Fast X-ray Transient and classical Supergiant X-ray Binaries

Hamaguchi, K.; Oskinova, L.; Russell, C. M. P.; Petre, R.; Enoto, T.; Morihana, K.; Ishida, M.: 2016, Astrophys. J. 832, 140 (11 pages) - arXiv:1608.01374
Discovery of Rapidly Moving Partial X-ray Absorbers within Gamma Cassiopeiae

S. Hubrig, A. Kholtygin, I. Ilyin, M. Schöller, L.M. Oskinova: 2016, Astrophys. J. 822, 104 (7 pages) - arXiv:1604.01068
The first spectropolarimetric monitoring of the peculiar O4Ief supergiant zeta Puppis

Hubrig, S.; Scholz, K.; Hamann, W.-R.; Schöller, M.; Ignace, R.; Ilyin, I.; Gayley, K. G.; Oskinova, L. M.: 2016, Monthly Not. Roy. Astron. Soc. 458, 3381 (13 pages) - arXiv:1603.01441
Searching for a magnetic field in Wolf-Rayet stars using FORS 2 spectropolarimetry

Lidia M. Oskinova: 2016, Advances in Space Research, Vol. 58, p. 739 (48 pages) - arXiv:1607.01553
X-ray diagnostics of massive star winds

Lidia M. Oskinova, Brankica Kubatova, Wolf-Rainer Hamann: 2016, Journal Quant. Spect. Rad. Trans. (JQSRT), Vol. 183, p. 100 (13 pages) - arXiv:1607.02388
Moving inhomogeneous envelopes of stars (Review)

Przybilla, N.; Fossati, L.; Hubrig, S.; Nieva, M.-F.; Järvinen, S. P.; Castro, N.; Schöller, M.; Ilyin, I.; Butler, K.; Schneider, F. R. N.; Oskinova, L. M.; Morel, T.; Langer, N.; de Koter, A.; the BOB collaboration: 2016, Astron. Astrophys. 587, A7 - arXiv:1601.02268 (15 pages)
B fields in OB stars (BOB): Detection of a magnetic field in the He-strong star CPD-57 3509

Richardson, Noel D.; Shenar, Tomer; et al.: 2016, MNRAS 461, 4115 (11 pages) - arXiv:1606.09586
The CHARA Array resolves the long-period Wolf-Rayet binaries WR 137 and WR 138

Sandin C.; Steffen, M.; Schönberner, D.; Rühling, U.: 2016, Astron. Astrophys. 586, A57 - arXiv:1512.04986 (11 pages)
Hot bubbles of planetary nebulae with hydrogen-deficient winds
I. Heat conduction in a chemically stratified plasma

T. Shenar, R. Hainich, H. Todt, A. Sander, W.-R. Hamann, A. F. J. Moffat, J. J. Eldridge, H. Pablo, L. M. Oskinova, N. D. Richardson: 2016, Astron. Astrophys. 591, A22 - arXiv:1604.01022 (10+10 pages)
Wolf-Rayet stars in the Small Magellanic Cloud:
II. Analysis of the binaries

Steinke, M.; Oskinova, L. M.; Hamann, W.-R.; Sander, A.; Liermann, A.; Todt, H.: 2016, Astron. Astrophys. 588, A9 - arXiv:1601.03395 (10 pages)
Analysis of the WN star WR 102c, its WR nebula, and the associated cluster of massive stars in the Sickle Nebula

Thomas, Timon; Feldmeier, Achim: 2016, Monthly Notices Roy. Astron. Soc. 460, 1923 (11 pages)
Radiative waves in stellar winds with line scattering

Toalá, J. A.; Oskinova, L. M.; González-Galán, A.; Guerrero M. A.; Ignace, R.; Pohl, M: 2016, Astrophys. J. 821, 79 (9 pages) - arXiv:1602.07805
X-Ray Observations of Bow Shocks around Runaway O Stars. The Case of ζ Oph and BD+43°3654

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Publications 2015

N. Castro, L. Fossati, S. Hubrig, S. Simón-Díaz, M. Schöller, I. Ilyin, T. A. Carrol, N. Langer, T. Morel, F. R. N. Schneider, N. Przybilla, A. Herrero, A. de Koter, L. M. Oskinova, A. Reisenegger, H. Sana, the BOB collaboration: 2015, A&A 581, A81 - arXiv:1507.03591 (16 pages)
B fields in OB stars (BOB): Detection of a strong magnetic field in the O9.7 V star HD54879

Corcoran, M. F, (...), Shenar, T., (...), Oskinova, L., Hamann, W.-R., et al.: 2015, Astrophys. Journal 809, 132 (19 pages) - arXiv:1507.05101
A Coordinated X-ray and Optical Campaign of the Nearby Massive Binary δ Orionis Aa:
I. Overview of the X-ray spectrum

C. J. Evans, J. Th. van Loon, R. Hainich, M. Bailey: 2015, A&A 584, A5 - arXiv:1508.03490 (19 pages)
2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds:
The north-eastern region of the Large Magellanic Cloud

Fossati, L.; Castro, N.; Morel, T.; Langer, N.; Briquet, M.; Carroll, T. A.; Hubrig, S.; Nieva, M. F.; Oskinova, L. M.; Przybilla, N., et al.: 2015, Astron. Astrophys. 574, A20 (15 pages)
B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars beta CMa and ε CMa. Possible lack of a "magnetic desert" in massive stars

Gimenez-Garcia, A.; Torrejon, J. M.; Eikmann, W.; Martinez-Nunez, S.; Oskinova, L. M.; Rodes-Roca, J. J.; Bernabeu, G.: 2015, Astron. Astrophys. 576, A106 (31 pages) - arXiv:1501.03636v2
An XMM-Newton view of FeKalpha in high-mass X-ray binaries

R. Hainich, D. Pasemann, H. Todt, T. Shenar, A. Sander, W.-R. Hamann : 2015, A&A 581, A21 (30 pages) - arXiv:1507.04000
Wolf-Rayet stars in the Small Magellanic Cloud:
I. Analysis of the single WN stars

Hubrig, S.; Schöller, M.; L. Fossati, T. Morel, N. Castro, L.M. Oskinova, N. Przybilla, S.S. Eikenberry, M.F. Nieva, N. Langer: 2015, Astron. Astrophys. 578, L3 (5 pages) - arXiv:1505.02447
B fields in OB stars (BOB): FORS2 spectropolarimetric follow-up of the two rare rigidly rotating magnetosphere stars HD23478 and HD345439

Hubrig, S.; Schöller, M.; Kholtygin, A. F.; Tsumura, H.; Hoshino, A.; Kitamoto, S.; Oskinova, L.; Ignace, R.; Todt, H.; Ilyin, I.: 2015, Monthly Notices Roy. Astron. Soc. 447, 1888 (10 pages) - arXiv:1412.1658
New multiwavelength observations of the Of?p star CPD -28o2561

Huenemoerder, David P.; Gayley, Kenneth G.; Hamann, Wolf-Rainer; Ignace, Richard; Nichols, Joy S.; Oskinova, Lidia; Pollock, Andrew M. T.; Schulz, Norbert S.; Shenar, Tomer: 2015, Astrophys. Journal 815, 29 (16 pages) - arXiv:1511.01832
Probing Wolf-Rayet Winds: Chandra/HETG X-Ray Spectra of WR 6

Martinez-Nunez, Silvia; Sander, Andreas; Gimenez-Garcia, Angel; Gónalez-Galán, Ana; Torrejón, José Miguel; Gónzalez-Fernández, Carlos; Hamann, Wolf-Rainer: 2015, Astron. Astrophys. 578, A107 (9 pages) - arXiv:1505.00557
The donor star of the X-ray pulsar X1908+075

Nichols, J.S., (...), Shenar, T., (...), Hamann, W.-R., Oskinova, L., et al.: 2015, Astrophys. Journal 809, 133 (21 pages) - arXiv:1507.04927
A Coordinated X-ray and Optical Campaign of the Nearby Massive Binary δ Orionis Aa:
II. X-ray Variability

Oskinova, L. M.; Todt, H.; Huenemoerder, D. P.; Hubrig, S.; Ignace, R.; Hamann, W.-R.; Balona, L.: 2015, Astron. Astrophys. 577, A32 (5 pages) - arXiv:1503.05749
On X-ray pulsations in beta Cephei-type variables

Pablo, H., (...), Shenar, T., (...), Hamann, W.-R., (...), Oskinova, L., et al.: 2015, Astrophys. Journal 809, 134 (11 pages) - arXiv:1504.08002
A Coordinated X-ray and Optical Campaign of the Nearby Massive Binary δ Orionis Aa:
III. Analysis of Optical Photometric MOST and Spectroscopic (Ground Based) Variations

A. Sander, T. Shenar, R. Hainich, A. Gímenez-García, H. Todt, and W.-R. Hamann: 2015, A&A 577, A13 (13 pages)
On the consistent treatment of the quasi-hydrostatic layers in hot star atmospheres

Shenar, T., Oskinova, L., Hamann, W.-R., et al.: 2015, Astrophys. Journal 809, 135 (20 pages) - arXiv:1503.03476
A Coordinated X-ray and Optical Campaign of the Nearby Massive Binary δ Orionis Aa:
IV. A multiwavelength, non-LTE spectroscopic analysis

Shrader, C. R.; Hamaguchi, K.; Sturner, S. J.; Oskinova, L. M.; Almeyda, T.; Petre, R: 2015, Astrophys. J. 799, 84 - arXiv:1410.4050
High-energy Properties of the Enigmatic Be Star gamma Cassiopeiae

Toala, J. A.; Guerrero, M. A.; Todt, H.; Hamann, W.-R.; Chu, Y.-H.; Gruendl, R. A.; Schönberner, D.; Oskinova, L. M.; Marquez-Lugo, R. A.; Fang, X.; Ramos-Larios, G.: 2015, Astrophys. J. 799, 67 - arXiv:1411.3837
The Born-again Planetary Nebula A78: An X-Ray Twin of A30

H. Todt, A. Y. Kniazev, V. V. Gvaramadze, W.-R. Hamann, M. Peña, G. Gräfener, D. Buckley , L. Crause, S. M. Crawford, A. A. S. Gulbis , C. Hettlage, E. Hooper, T.-O. Husser, P. Kotze, N. Loaring, K. H. Nordsieck, D. O'Donoghue, T. Pickering, S. Potter, E. Romero-Colmenero, P. Vaisanen, T. Williams, M. Wolf: 2015, ASPC 493, 539
Hydrogen-deficient central stars of planetary nebulae

H. Todt, M. A. Guerrero, X. Fang, J. A. Toalá, , J. S. Arthur, W. P. Blair, Y.-H. Chu, R. A. Gruendl, W.-R. Hamann, R. A. Márquez-Lugo, L. Oskinova, N. Ruiz, M. Steffen, D. Schönberner: 2015, ASPC 493, 141
The Born-again Planetary Nebulae Abell 30 and Abell 78

H. Todt, A. Sander, R. Hainich, W.-R. Hamann, M. Quade, T. Shenar: 2015, A&A, 579, 75
Potsdam Wolf-Rayet model atmosphere grids for WN stars

Torrejón, J. M.; Schulz, N. S.; Nowak, M. A.; Oskinova, L.; Rodes-Roca, J. J.; Shenar, T.; Wilms, J.: 2015, Astrophys. J. 810, 102 (11 pages)
On the Radial Onset of Clumping in the Wind of the B0I Massive Star QV Nor

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Publications 2014

A. Danehkar, H. Todt, B. Ercolano and A. Y. Kniazev: 2014, Monthly Notices Roy. Astron. Soc., 439, Issue 4, p.3605-3615
Observations and three-dimensional photoionization modelling of the Wolf-Rayet planetary nebula Abell 48

Fang, X.; Guerrero, M. A.; Marquez-Lugo, R. A.; Toalá, J. A.; Arthur, S. J.; Chu, Y.-H.; Blair, W. P.; Gruendl, R. A.; Hamann, W.-R.; Oskinova, L. M.; Todt, H.: 2014, Astrophys. J. 797, 100 - arXiv:1410.3872
Expansion of Hydrogen-poor Knots in the Born-again Planetary Nebulae A30 and A78

V.V. Gvaramadze, A.-N. Chene, A.Y. Kniazev, O. Schnurr, T. Shenar, A. Sander, R. Hainich, N. Langer, W.-R. Hamann, Y.-H. Chu, R.A. Gruendl: 2014, Monthly Notices Roy. Astron. Soc. 442, 929 - arXiv:1405.1423
Discovery of a new Wolf-Rayet star and a candidate star cluster in the Large Magellanic Cloud with Spitzer

R. Hainich, U. Rühling, H. Todt, L. M. Oskinova, A. Liermann, G. Gräfener, C. Foellmi, O. Schnurr, and W.-R. Hamann: 2014, Astron. Astrophys. 565, A27 - arXiv:1401.5474
The Wolf-Rayet stars in the Large Magellanic Cloud: A comprehensive analysis of the WN class

Hubrig, S.; Fossati, L.; Carroll, T. A.; Castro, N.; González, J. F.; Ilyin, I.; Przybilla, N.; Schöller, M.; Oskinova, L. M.; Morel, T.; Langer, N.; Scholz, R. D.; Kharchenko, N. V.; Nieva, M.-F.: 2014, Astron. Astrophys. 564, L10 - arXiv:1403.0491
B fields in OB stars (BOB): The discovery of a magnetic field in a multiple system in the Trifid Nebula, one of the youngest star forming regions

Kurfürst, P.; Feldmeier, A.; Krticka, J.: 2014, Astron. Astrophys. 569, A23 - arXiv:1407.7952
Time-dependent modeling of extended thin decretion disks of critically rotating stars

Kusterer, D.-J.; Nagel, T.; Hartmann, S.; Werner, K.; Feldmeier, A.: 2014, Astron. Astrophys. 561, A14
Monte Carlo radiation transfer in CV disk winds: application to the AM CVn prototype

D. Massa, L. Oskinova, A.W. Fullerton, R.K. Prinja, D.A. Bohlender, N.D. Morrison, M. Blake and W. Pych: 2014, Monthly Notices Roy. Astron. Soc. 441, 2173 - arXiv:1403.5601
CIR Modulation of the X-ray Flux from the O7.5 III(n)((f)) Star ξ Persei?

Yael Naze, Q. Daniel Wang, You-Hua Chu, Robert Gruendl, Lida Oskinova: 2014, Astrophys. J. Suppl. 213, 23 - arXiv:1406.3979
A Deep Chandra Observation of the Giant HII Region N11. I. X-ray Sources in the Field

Oskinova, Lidia M.; Naze, Yael; Todt, Helge; Huenemoerder, David P.; Ignace, Richard; Hubrig, Swetlana; Hamann, Wolf-Rainer: 2014, Nature Comm. 5, 4024 - arXiv:1406.0845
A new type of X-ray pulsar

N. Reindl, T. Rauch, M. Parthasarathy, K. Werner, J.W. Kruk, W.-R. Hamann, A. Sander, and H. Todt: 2014, Astron. Astrophys. 565, A40 - arXiv:1403.6056
The rapid evolution of the exciting star of the Stingray Nebula

N. Reindl, T. Rauch, K. Werner, J.W. Kruk, H. Todt: 2014, Astron. Astrophys. 566, A116
On helium-dominated stellar evolution: the mysterious role of the O(He)-type stars

A. Sander, H. Todt, R. Hainich, and W.-R. Hamann: 2014 Astron. Astrophys. 563, A89 - arXiv:1402.2282
The Wolf-Rayet stars in M31: I. Analysis of the late-type WN stars

T. Shenar, W.-R. Hamann, H. Todt: 2014, Astron. Astrophys. 562, A118 - arXiv:1401.2159
The impact of rotation on the line profiles of Wolf-Rayet stars

M. Steffen, S. Hubrig, H. Todt, M. Schöller, W.-R. Hamann, C. Sandin, D. Schönberner: 2014, Astron. Astrophys. 570, A88
Weak magnetic fields in central stars of planetary nebulae?

M. Steffen, S. Hubrig, H. Todt, M. Schöller, W.-R. Hamann, C. Sandin, D. Schönberner: 2014, in: Putting A Stars into Context: Evolution, Environment, and Related Stars, Publishing house "Pero", p. 351-356
Detecting weak magnetic fields in the central stars of planetary nebulae

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Publications 2013

S. Burgemeister, V.V. Gvaramadze, G.S. Stringfellow, A.Y. Kniazev, H. Todt, and W.-R. Hamann: 2013, Monthly Notices Roy. Astron. Soc. 429, 3305
WR120bb and WR120bc: a pair of WN9h stars with possibly interacting circumstellar shells

Hubrig, S.; Schöller, M.; Ilyin, I.; Kharchenko, N. V.; Oskinova, L. M.; Langer, N.; Gonzalez, J. F.; Kholtygin, A. F.; Briquet, M.; Magori Collaboration: 2013, Astron. Astrophys. 551, 33 - arXiv:1301.4376
Exploring the origin of magnetic fields in massive stars. II. New magnetic field measurements in cluster and field stars

R. Ignace, K.G. Gayley, W.-R. Hamann, D.P. Huenemoerder, L.M. Oskinova, A.M.T. Pollock, M. McFall: 2013, Astrophys. J. 775, 29 - arXiv:1307.7074
The XMM-Newton EPIC X-ray Light Curve Analysis of WR 6

R. Ignace, L.M. Oskinova, D. Massa: 2013, Monthly Notices Roy. Astron. Soc. 429, 516
A report on the X-ray properties of the τ Sco-like stars

Yael Naze, Lidia M. Oskinova, Eric Gosset: 2013, Astrophys. J. 763, 143 - arXiv:1212.1554
A Detailed X-Ray Investigation of ζ Puppis. II. The Variability on Short and Long Timescales

L. M. Oskinova, M. Steinke, W.-R. Hamann, A. Sander, H. Todt, A. Liermann: 2013, Monthly Notices Royal Astron. Soc. 436, 3357 - arXiv:1309.7651
One of the most massive stars in the Galaxy may have formed in isolation

L. M. Oskinova, W. Sun, C. J. Evans, V. Henault-Brunet, Y.-H. Chu, J. S. Gallagher III, M. A. Guerrero, R. A. Gruendl, M. Güdel, S. Silich, Y. Chen, Y. Naze, R. Hainich, J. Reyes-Iturbide: 2013, Astrophys. J. 765, 73 - arXiv:1301.3500
Discovery of X-ray emission from young suns in the Small Magellanic Cloud

R. Sturm, F. Haberl, L. M. Oskinova, M. P. E. Schurch, V. Henault-Brunet, J. S. Gallagher III, A. Udalski: 2013, Astron. Astrophys. 556, 139 - arXiv:1304.6022
Long-term evolution of the neutron-star spin period of SXP 1062

B. Surlan, W.-R. Hamann, A. Aret, J. Kubat, L.M. Oskinova, A.F. Torres: 2013, Astron. Astrophys. 59, A130 - arXiv:1310.0449
Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars

H. Todt, A. Y. Kniazev, V. V. Gvaramadze, W.-R. Hamann, D. Buckley, L. Crause, S. M. Crawford, A. A. S. Gulbis, C. Hettlage, E. Hooper, T.-O. Husser, P. Kotze, N. Loaring, K. H. Nordsieck, D. O'Donoghue, T. Pickering, S. Potter, E. Romero-Colmenero, P. Vaisanen, T. Williams, M. Wolf: 2013, Monthly Notices Roy. Astron. Soc. 430, 2302
Abell 48 - a rare WN-type central star of a planetary nebula

Todt H., Peña M., Hamann W.-R., Gräfener G.: 2013, in: Eurowd2012, Proceedings of the 18th European Workshop on White Dwarfs, J. Krzesinski, G. Stachowski, P. Moskalik (eds.), ASP Conf. Ser. 469, 303
Spectral analyses of Wolf-Rayet type central stars

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Publications 2012

C. J. Evans, R. Hainich, L. M. Oskinova, J. S. Gallagher III, Y.-H. Chu, R. A. Gruendl, W.-R. Hamann, V. Henault-Brunet, H. Todt: 2012, Astrophysical J. 753, 173
A rare O3-type dwarf revealed in the wing of the Small Magellanic Cloud

M. A. Guerrero, N. Ruiz, W.-R. Hamann, Y.-H. Chu, H. Todt, D. Schoenberner, L. Oskinova, R. A. Gruendl, M. Steffen, W. P. Blair, J. A. Toala: 2012, Astrophysical J. 755, 129
Rebirth of X-ray Emission from the Born-Again Planetary Nebula A 30

M.A. Guerrero, Y.-H. Chu, W.-R. Hamann, L.M. Oskinova, D. Schönberner, H. Todt, M. Steffen, N. Ruiz, R.A. Gruendl, W.P. Blair: 2012, in: "Planetary Nebulae; an Eye to the Future", IAU Symp. 283, p. 378
Ablation and Wind Mass-Loading in the Born-Again Planetary Nebula A30

Gvaramadze V.V., (...), H. Todt, W.-R. Hamann, et al.: 2012, Monthly Notices Roy. Astron. Soc. 421, 3325 - 3337
Discovery of two new Galactic candidate luminous blue variables with WISE

Rainer Hainich: Diplomarbeit, Universität Potsdam, 2012
Non-LTE Spektralanalyse von OB-Sternen im Sternhaufen NGC 602 in der kleinen Magellanschen Wolke

V. Henault-Brunet, L.M. Oskinova, M.A. Guerrero, W. Sun, Y.-H. Chu, C.J. Evans, J.S. Gallagher III, R.A. Gruendl, J. Reyes-Iturbide: 2012, Monthly Notices Roy. Astron. Soc. Letters, 420, L13 - L17
Discovery of a Be/X-ray pulsar binary and associated supernova remnant in the Wing of the Small Magellanic Cloud

Huenemoerder D.P., Oskinova L.M., Ignace R., Waldron W.L., Todt H., Hamaguchi K., Kitamoto S.: 2012, Astroph. J. Letters 756, L34
On the Weak-Wind Problem in Massive Stars: X-ray Spectra Reveal a Massive Hot Wind in μ Columbae

A. Liermann, W.-R. Hamann, L.M. Oskinova: 2012, Astron. Astrophys. 540, A14
The Quintuplet cluster. III. Hertzsprung-Russell diagram and cluster age

L.M. Oskinova, A. Feldmeier, P. Kretschmar: 2012, Monthly Not. Roy. Astron. Soc. 421, 2280 - 2831
Clumped stellar winds in supergiant high-mass X-ray binaries: X-ray variability and photoionization

L.M. Oskinova, M.A. Guerrero, V. Henault-Brunet, W. Sun, Y.-H. Chu, C.J. Evans, J.S. Gallagher III, R.A. Gruendl, J. Reyes-Iturbide: 2012, in: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years Proceedings IAU Symposium No. 291, J. van Leeuwen (ed.), p. 459 - 461
The slow X-ray pulsar SXP1062 and associated supernova remnant in the Wing of the Small Magellanic Cloud

Oskinova, L.M.; Gayley, K.G.; Hamann, W.-R.; Huenemoerder, D.P.; Ignace, R.; Pollock, A.M.T.: 2012, Astrophys. J. Letters 747, L25
High-resolution X-ray spectroscopy reveals the special nature of Wolf-Rayet star winds

Oskinova, L.; Hamann, W.-R.; Todt, H.; Sander, A.: 2012, in: "Four Decades of Research on Massive Stars", ASP Conference Series, Vol. 465, p. 172 (4 pages)
Macroclumping, Magnetic Fields, and X-Rays in Massive Stars

A. Sander, W.-R. Hamann, H. Todt: 2012, Astron. Astrophys. 540, A144
The Galactic WC stars: Stellar parameters from spectral analyses indicate a new evolutionary sequence

Sander A., Hamann W.-R.: 2012, in: "Four Decades of Research on Massive Stars", ASP Conference Series, Vol. 465, p. 243 (5 pages)
WC stars and their role in the life cycle of massive stars

Sander A., Hamann W.-R.: 2012, in: "Four Decades of Research on Massive Stars", ASP Conference Series, Vol. 465, p. 249 (3 pages)
Stellar Parameters of Galactic WC stars

C. Sandin, M. Steffen, R. Jacob, D. Schönberner, U. Rühling, W.-R. Hamann, H. Todt: 2012, in: "Planetary Nebulae; an Eye to the Future", IAU Symp. 283, 494
The role of heat conduction to the formation of [WC]-type Planetary Nebulae

Surlan B., Hamann W.-R., Kubat J., Oskinova L., Feldmeier A.: 2012, in: "Four Decades of Research on Massive Stars", ASP Conference Series, Vol. 465, p. 134 (7 pages)
3-D Monte Carlo radiative transfer calculation of resonance line formation in the inhomogeneous expanding stellar wind

Brankica Surlan, Wolf-Rainer Hamann, Jiri Kubat, Lidia M. Oskinova, Achim Feldmeier: 2012, Astron. Astrophys. 541, A37 (11 pages)
Three-dimensional radiative transfer in clumped hot star winds I. Influence of clumping on the resonance line formation

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Publications 2011

Burgemeister, Sonja: 2011, Bachelorarbeit, Universität Potsdam
Analyse zweier kürzlich entdeckter Wolf-Rayet-Sterne im Scutum-Crux-Arm

Nancy Remage Evans, Kathleen DeGioia-Eastwood, Marc Gagne, Leisa Townsley, Patrick Broos, Scott Wolk, Yael Naze, Michael Corcoran, Lida Oskinova, Anthony F. J. Moffat, Junfeng Wang, Nolan R. Walborn: 2011, Astrophys. J. Suppl. Ser. 194:13
The Search for Low-mass Companions of B Stars in the Carina Nebula Cluster Trumpler 16

Marc Gagne, Garrett Fehon, Michael R. Savoy, David H. Cohen, Leisa K. Townsley, Patrick S. Broos, Matthew S. Povich, Michael F. Corcoran, Nolan R. Walborn, Nancy Remage Evans, Anthony F.J. Moffat, Yael Naze and Lidia M. Oskinova: 2011, Astrophys. J. Suppl. Ser. 194:5
Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields

Hamann W.-R., Barniske A., Liermann A., Oskinova L.M., Pasemann D., Rühling U.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 98
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
The most luminous stars in the Galaxy and the Magellanic Clouds

A.F. Kholtygin; S.N. Fabrika; N. Rusomarov; W.-R. Hamann; D.O. Kudryavtsev; L.M. Oskinova; and G.A. Chountonov: 2011, Astronomische Nachrichten 332, 1008 - 1011
Line profile variability and magnetic fields of Wolf-Rayet stars: WR135 and WR136

Krticka, Jiri; Feldmeier, Achim; Oskinova, Lidia M.; Kubat, Jiri; Hamann, Wolf-Rainer: 2011, Proc. IAU Symp. 272, p. 614 - 615
X-ray emission from hydrodynamical wind simulations in non-LTE models

Liermann A., Hamann W.-R., Oskinova L.M., Todt H.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 160
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
High-mass stars in the Galactic center Quintuplet cluster

Moschner, Nadine: 2011, Master (of Education) Thesis, Universität Potsdam
Wolf-Rayet-Sterne in Galaxien mit unterschiedlichem Metallgehalt: Ein phänomenologischer Vergleich ihrer Spektren (1MB)

Y. Naze, P.S. Broos, L. Oskinova, L.K. Townsley, D. Cohen, M.F. Corcoran, N.R. Evans, M. Gagne, A.F.J. Moffat, J.M. Pittard, G. Rauw, A. ud-Doula, N.R. Walborn: 2011, Astrophys. J. Suppl. Ser. 194:7
Global X-ray properties of the O and B stars in Carina

L.M. Oskinova, H. Todt, R. Ignace, J.C. Brown, J.P. Cassinelli, W.-R. Hamann: 2011, MNRAS 416, 1456
Early magnetic B-type stars: X-ray emission and wind properties

L.M. Oskinova, W.-R. Hamann, J.P. Cassinelli, J.C. Brown, H. Todt: 2011, Astronomische Nachrichten 332, 988 - 993
X-ray emission from massive stars with magnetic fields

Oskinova L.M., Hamann W.-R., Ignace R., Feldmeier A.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 54
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
X-rays, clumping and wind structures

E.R. Parkin, P.S. Broos, L.K. Townsley, J.M. Pittard, A.F.J. Moffat, Y. Naze, G. Rauw, L.M. Oskinova, W.L. Waldron: 2011, Astrophys. J. Suppl. Ser. 194, 8
X-ray Emission from the Double-binary OB-star System QZ Car (HD 93206)

Pasemann D., Rühling U., Hamann W.-R.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 180
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
Spectral analyses of the Wolf-Rayet stars in the Small Magellanic Cloud

Rauw G., Oskinova L.M.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 475
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
Studying massive stars with the International X-ray Observatory

Sander A., Hamann W.-R., Todt H.: 2011, in: "The multi-wavelength view of hot, massive stars", Bulletin de la Société Royale des Sciences de Liège, Vol. 80, p. 185
(online publication, http://popups.ulg.ac.be/SRSL/sommaire.php?id=2361)
Revised spectral analyses of Galactic WC stars

Schoeller, M.; Hubrig, S.; Ilyin, I.; Kharchenko, N. V.; Briquet, M.; Langer, N.; Oskinova, L. M.; the MAGORI collaboration: 2011, Astronomische Nachrichten 332, 994 - 997
Magnetic field studies of massive main sequence stars

Leisa Townsley, ..., L.M. Oskinova, et al.: 2011, Astrophys. J. Suppl. Ser. 194:1 (28 pages)
AN INTRODUCTION TO THE CHANDRA CARINA COMPLEX PROJECT

Zühlke, Julia: 2011, Master (of Education) Thesis, Universität Potsdam
Reduktion und Auswertung von Beobachtungen Planetarischer Nebel mit dem Integralfeld-Spektrographen PMAS (20Mb)

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Publications 2010

Gagne M., Townsley L., Corcoran M., Cohen D., Dickerson K., Oskinova L.M., Naze Y., Broos P.: 2010, Bulletin of the American Astronomical Society Vol. 41, p. 684
The Chandra Carina Complex Project: Massive Stars

Gorski M., Ignace R., Oskinova L.M.: 2010, Bulletin of the American Astronomical Society Vol. 41, p. 344
An X-ray Analysis of α Cru

Gvaramadze V.V., Kniazev A.Y., Hamann W.-R., Berdnikov L.N., Fabrica S., Valeev A.F.: 2010, Monthly Notices Roy. Astron. Soc. 403, 760
A new Wolf-Rayet star and its circumstellar nebula in Aquila

Hamann W.-R.: 2010, Astrophysics and Space Science 329, 151
Stellar winds from hot low-mass stars

Ignace, R.; Oskinova, L. M.; Jardine, M.; Cassinelli, J. P.; Cohen, D. H.; Donati, J.-F.; Townsend, R. H. D.; ud-Doula, A.: 2010, ApJ 721, 1412
Multiphase Suzaku Study of X-rays from τ Sco

Jeffery, C.S., Hamann W.-R.: 2010, Monthly Notices Roy. Astron. Soc. 404, 1698
Stellar Winds and Mass Loss from Extreme Helium Stars

Liermann A., Hamann W.-R., Oskinova L.M., Todt H., and Butler K.: 2010, Astron. Astrophs. 524, A82
The Quintuplet cluster
II. Analysis of the WN stars

Liermann A., Kraus M., Schnurr O., Borges M.: 2010, MNRAS, 408, L6
The 13Carbon footprint of B[e] supergiants

Liermann A., Hamann W.-R., Feldmeier A., Oskinova L.M., Rühling U., Todt H.: 2010, RevMexAA 38, 50
Structured stellar winds

Oskinova L.M., Ignace R.: 2010, ASP Conf. Series 423, p. 52
X-ray Emission from the Star-Forming Region NGC 602 in the SMC

Oskinova L.M., Gruendl R.A., Ignace R., Hamann W.-R., Feldmeier A., Chu Y.-H.: 2010, Astrophys. J. 712, 763
Hard X-ray emission in the star-forming region ON2: discovery with XMM-Newton

Rühling U., Sandin C., Steffen M., Schönberner D., Hamann W.-R., Todt H.: 2010, in: 17th European White Dwarf Workshop. AIP Conference Proceedings, Vol. 1273, p. 219 (online publication)
Diffuse X-rays from PNe with WR-type central stars

Sander A.: 2010, Diplomarbeit, Universität Potsdam
Die galaktischen Wolf-Rayet-Sterne der Kohlenstoffsequenz

Sundqvist J.O., Puls J., Feldmeier A.: 2010, Astron. Astrophys. 510, 11
Mass loss from inhomogeneous hot star winds
I. Resonance line formation in 2D models

Todt H., Peña M., Hamann W.-R., Gräfener G.: 2010, Astron. Astrophys. 515, 83
The central star of the planetary nebula PB 8: a Wolf-Rayet-type wind of an unusual WN/WC chemical composition

Todt H.: Dissertation
Hydrogen-deficient central stars of planetary nebulæ

H. Todt, M. Peña, W.-R. Hamann, G. Gräfener: 2010, in: 17th European White Dwarf Workshop. AIP Conference Proceedings, Vol. 1273, p. 213 (online publication)
[WN] central stars of planetary nebulae

Votruba V., Feldmeier A., Krticka J., Kubat J.: 2010, Astrophys. Space Sci. 329, 159
Multicomponent stellar wind from hot subdwarfs stars

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Publications 2009

Gvaramadze V.V., Fabrica S., Hamann W.-R., Sholukhova O., Valeev A.F., Goranskij V.P., Cherepashchuk A.M., Bomans D.J., Oskinova L.M.: 2009, Monthly Notices Roy. Astron. Soc. 400, 524
Discovery of a new Wolf Rayet star and its ring nebula in Cygnus

Hamann W.-R., Gräfener G., Oskinova L.M., Feldmeier A: 2009, in: Recent directions in astrophysical quantitative spectroscopy and radiation hydrodynamics. AIP Conference Proceedings 1171, p. 136-147
Spectroscopy and hydrodynamics of dense stellar winds

Krticka J., Feldmeier A., Oskinova L.M., Kubat J., Hamann W.-R.: 2009, Astron. Astrophys. 508, 841
X-ray emission from hydrodynamical simulations in non-LTE wind models

Liermann, Adriane: 2009, Thesis, Universität Potsdam
Massive stars in the Galactic Center Quintuplet cluster

Liermann, A., Hamann W.-R., Oskinova L.M.: 2009, Astron. Astrophs. 494, 1137
The Quintuplet cluster I. A K-band spectral catalog of stellar sources

Oskinova L. M., Hamann, W. -R., Feldmeier, A., Ignace, R., Chu, Y. -H.: 2009, Astrophys. J. Letters 693, L44-L48
Discovery of X-ray Emission from the Wolf-Rayet star WR142 of oxygen subtype

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Publications 2008

Barniske A., Oskinova L.M., Hamann W.-R.: 2008, Astron. Astrophys. 486, 971
Two extremely luminous WN stars in the Galactic Center with circumstellar emission from dust and gas

A. Feldmeier, W.-R. Hamann, D. Rätzel, L. M. Oskinova: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 115

Hydrodynamic simulations of clumps

Gräfener, G: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 103

Clumping in hydrodynamic atmosphere models

Gräfener G., Hamann W.-R.: 2008,
in: Mass Loss from Stars and the Evolution of Stellar Clusters, A. de Koter, L.J. Smith and L.B.F.M. Waters (eds.), ASP Conf. Ser., Vol. 388, p. 21

Are Wolf-Rayet winds driven by radiation?

Gräfener G., Hamann W.-R.: 2008,
in: Metal Rich Universe, Garik Israelian and George Meynet (eds.), Series: Cambridge Contemporary Astrophysics, p. 321

Are WNL stars tracers of high metallicity?

Gräfener, G. and Hamann, W.-R.: 2008, Astron. Astrophys. 482, 945
Mass loss from late-type WN stars and its Z-dependence: very massive stars approaching the Eddington limit

Gräfener G., Hamann W.-R.: 2008,
in: Massive Stars: Fundamental Parameters and Circumstellar Interactions, P. Benaglia, G. L. Bosch, & C. E. Cappa (eds.), Revista Mexicana de Astronomia y Astrofisica (Serie de Conferencias) Vol. 33, p. 88

The nature of the Wolf-Rayet phenomenon: mass loss close to the Eddington limit

Gräfener G., Hamann W.-R., Todt H.: 2008,
in: Hydrogen-Deficient Stars. K. Werner and T. Rauch (eds.), ASP Conf. Ser., Vol. 391, p. 99

WR Wind Models: [WC]-Type CSPN vs. Massive Stars

Hamann W.-R., Gräfener G., Feldmeier A., Oskinova L., Barniske A., Liermann A.: 2008,
in: Hydrogen-Deficient Stars. K. Werner and T. Rauch (eds.), ASP Conf. Ser., Vol. 391, p. 293

Wolf-Rayet Analyses

Wolf-Rainer Hamann, Achim Feldmeier, Lidia Oskinova (eds.)
Clumping in Hot-Star Winds
Proceedings of an International Workshop held in Potsdam, Germany, 18.-22. June 2007. URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981. ISBN 978-3-940793-33-1

Hamann, W.-R., Oskinova, L.M., Feldmeier, A.: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 75

Spectrum formation in clumpy stellar winds

Hamann W.-R., Gräfener G., Oskinova L., Liermann A.: 2008,
in: Mass Loss from Stars and the Evolution of Stellar Clusters, A. de Koter, L.J. Smith and L.B.F.M. Waters (eds.), ASP Conf. Ser., Vol. 388, p. 171

Do we understand Wolf-Rayet stars?

Ignace R., Oskinova L. M., Waldron W. L., Hoffman J. L., Hamann W.-R.: 2008,
Astron. Astrophys. Letters, 447, L37

Phase-dependent X-ray observations of the beta Lyrae system: No eclipse in the soft band

Liermann, A., Hamann, W.-R.: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 247

Clumping in Galactic WN stars: a comparison of mass loss rates from UV/optical & radio diagnostics

Oskinova L.M., Hamann W.-R.: 2008, Monthly Notices Roy. Astron. Soc. 390L, 78
Puzzling X-rays from the new colliding wind binary Wolf-Rayet 65 (WC9d)

Oskinova, L.M., Hamann, W.-R., Feldmeier, A.: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 203

X-raying clumped stellar winds

Oskinova L., Hamann W.-R., Feldmeier A.: 2008,
in: Mass Loss from Stars and the Evolution of Stellar Clusters, A. de Koter, L.J. Smith and L.B.F.M. Waters (eds.), ASP Conf. Ser., Vol. 388, p. 213

Examining O and WR star winds with X-rays

Miriam Peña, M. Teresa Ruiz, Patricio Rojo, Silvia Torres-Peimbert, and Wolf-Rainer Hamann: 2008, Astrophysical Journal 680, 109
A New Outburst In the Extraordinary Central Star of LMC-N66

Rauw G., Naze Y., Oskinova L.M.: 2008,
Astronomische Nachrichten 329, 222

X-ray spectroscopy of early-type stars: the present and the future

Rühling, U.: 2008, Diplomarbeit an der Universität Potsdam
WN-Sterne in der LMC

Todt, H., Hamann, W.-R., Gräfener, G.: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 251

Clumping in [WC]-type Central Stars from electron-scattering line wings

Todt H., Peña M., Hamann W.-R., Gräfener G.: 2008,
in: Hydrogen-Deficient Stars. K. Werner and T. Rauch (eds.), ASP Conf. Ser., Vol. 391, p. 95

Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis

Votruba, V., Feldmeier, A., Kubat, J., Rätzel, D.: 2008, in:
Clumping in Hot Star Winds, W.-R. Hamann, A. Feldmeier & L.M. Oskinova (eds.), Potsdam: Univ.-Verlag,
URN: http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13981, p. 252

Multicomponent stellar wind of hot stars

Votruba V., Feldmeier A., Kubat J., Nikutta R.: 2008,
in: Mass Loss from Stars and the Evolution of Stellar Clusters, A. de Koter, L.S. Smith and R. Waters (eds.), ASP Conf. Ser., Vol. 388, p. 229

Multicomponent stellar wind of hot stars

Waldron W.L., Cassinelli J.P., Oskinova L.M., Lamers H.: 2008,
in: American Astronomical Society 211th Meeting, Austin, Texas

The B Supergiant Discontinuous Drop in X-ray Luminosity at Spectra Typ

Oskinova L.M.: 2008, NASA Press Release 15.07.2008
'Peony Nebula' Star Settles for Silver Medal
NASA link
Pdf Version (english)
Pdf Version (deutsch)

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Publications 2007

Gräfener G., Hamann W.-R.,: 2007, in: A.F.J. Moffat and N. St-Louis (eds), Massive Stars in Interacting Binaries, ASP Conf. Series, Vol. 367, p. 131
Hydrodynamic model atmospheres for WR stars: first results and their consequences for interacting winds in massive binary systems

Hamann W.-R., Gräfener G.: 2007, in: A.F.J. Moffat and N. St-Louis (eds), Massive Stars in Interacting Binaries, ASP Conf. Series, Vol. 367, p. 141
Wolf-Rayet spectra: how to tell binaries from singles

Madura T., Owocki S.P., Feldmeier A.: 2007, Astrophysical Journal, 660, 687-698
A Nozzle Analysis of Slow-Acceleration Solutions in One-dimensional Models of Rotating Hot-Star Winds

Oskinova, L. M.: 2007, in: A.F.J. Moffat and N. St-Louis (eds), Massive Stars in Interacting Binaries, ASP Conf. Series, Vol. 367, p. 637
Evolution of X-ray emission from young massive stellar clusters

Oskinova L. M., Hamann W.-R., Feldmeier A.: 2007, Astron. Astrophys., 476, 1331-1340
Neglecting the porosity of hot-star winds can lead to underestimating mass-loss rates

Votruba, V., Feldmeier, A., Kubat, J., Nikutta, R.: 2007, in: Active OB-Stars: Laboratories for Stellar & Circumstellar Physics, A. Okazaki, S. Owocki and S. Stefl (eds.), ASP Conf. Ser., Vol. 361, p. 165
Time-dependent simulation of a multicomponent stellar wind

Votruba, V., Feldmeier, A., Kubat, J., Rätzel, D.: 2007, in: Astron. Astrophysics, 474, 549
A hydrodynamic scheme for two-component winds from hot stars

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Publications 2006

Barniske A., Hamann W.-R., Gräfener G.: 2006, in: Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology. Eds. H.J.G.L.M. Lamers, N. Langer, T. Nugis & K. Annuk. ASP Conference Series, Vol. 353, p. 243
Wolf-Rayet stars of the carbon sequence

Barniske A., Oskinova L., Hamann W.-R., Gräfener: 2006, in: Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology. Eds. H.J.G.L.M. Lamers, N. Langer, T. Nugis & K. Annuk. ASP Conference Series, Vol. 353, p. 241
Spitzer mid-IR spectroscopy of Wolf-Rayet stars: the frequent detection of circumstellar dust

Feldmeier A., Nikutta R.: 2006, Astron. Astrophysics, 446, 661
Nonlocal radiative coupling in non monotonic stellar winds

Gräfener, G., Hamann, W.-R.,: 2006, in: Highlights of Astronomy, Vol. 14, XXVIth IAU General Assembly, K.A. van der Hucht (ed.), JD05 #7
The masses of late-type WNL stars

Gräfener G., Hamann W.-R.: 2006, in: Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology. Eds. H.J.G.L.M. Lamers, N. Langer, T. Nugis & K. Annuk. ASP Conference Series, Vol. 353, p. 171
The metallicity dependence of WR wind models

Hamann W.-R., Gräfener G., Liermann A.: 2006, Astron. Astrophysics, 457, 1015
The Galactic WN stars. Spectral analyses with line-blanketed model atmospheres versus stellar evolution models with and without rotation

Hamann W.-R., Gräfener G., Liermann A.: 2006, in: Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology. Eds. H.J.G.L.M. Lamers, N. Langer, T. Nugis & K. Annuk. ASP Conference Series, Vol. 353, p. 185
The Galactic WN stars: line-blanketed analyses versus evolutionary models

Oskinova L. M., Feldmeier A., Hamann W.-R.: 2006, Mon. Not. R. Astron. Soc., 372, 313
High resolution X-ray spectroscopy of bright O type stars

Oskinova L., Feldmeier A., Hamann W.-R.: 2006, in: Proceedings of the symposium "The X-ray Universe 2005", ESA, El Escorial, Madrid, Spain, 26-30 September 2005, ESA SP-604, 57-62
O Stars X-ray Line Profiles Explained by Radiation Transfer in Inhomogeneous Stellar Wind

Oskinova L., Feldmeier A., Hamann W.-R.: 2006, in: High Resolution X-ray Spectroscopy: towards XEUS and Con-X, Proceedings of the international workshop held at the Mullard Space Science Laboratory of University College London, Holmbury St Mary, Dorking, Surrey, UK, March 27 - 28, 2006, Ed. Branduardi-Raymont, G., published electronically., p.E2
Quantitative X-ray Spectroscopy of Massive Stars

Todt, H., Gräfener, G., Hamann, W.-R.: 2006, in: Planetary Nebulae in Our Galaxy and Beyond, Proceedings IAU Symposium No. 234, M.J. Barlow and R.H. Méndez (eds.), p. 127
Revised element abundances for WC-type central stars

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Publications 2005

C. J. Evans, S. J. Smartt, J.-K. Lee, D. J. Lennon, A. Kaufer, P. L. Dufton, C. Trundle, A. Herrero, S. Simon-Diaz, A. de Koter, W.-R. Hamann, M. A. Hendry, I. K. Hunter, M. J. Irwin, A. J. Korn, R.-P. Kudritzki, N. Langer, M. R. Mokiem, F. Najarro, A. W. A. Pauldrach, N. Przybilla, J. Puls, R. S. I. Ryans, M. A. Urbaneja, K. A. Venn, M. R. Villamariz: 2005, Astron. Astrophys., 437, 467-482
The VLT-FLAMES Survey of Massive Stars: Observations in the Galactic Clusters NGC 3293, NGC 4755 and NGC 6611

Gräfener, G., Hamann, W.-R.: 2005, Astron. Astrophys., 432, 633
Hydrodynamic model atmospheres for WR stars: Self-consistent modeling of a WC star wind

Hamann, W.-R., Gräfener, G.: 2005, in: 14th European Workshop on White Dwarfs. D. Koester and S. Moehler (eds.), ASP Conf. Series, Vol. 334, 341
Hydrogen-deficient stars in pre-WD stages

Hamann, W.-R., Todt H. and Gräfener G.: 2005, in: "Planetary Nebulae as Astronomical Tools", Proceedings of a Conference held in Gdansk (Poland), July 2005, p. 153
Hydrogen-deficient central stars revisited

Hamann, W.-R., Pena, M., Gräfener, G.: 2005, in: 14th European Workshop on White Dwarfs. D. Koester and S. Moehler (eds.), ASP Conf. Series, Vol. 334, 345
LMC-N66: A potential SN Ia progenitor?

Krumpe, M., Coffey, D., Egger, G., Vilardell, F., Lefever, K., Liermann, A., Hoffmann, A.I., Steiper, J., Cherix, M., Albrecht, S., Russo, P., Strodl, T., Wahlin, R., Deroo, P., Parmar, A., Lund, N., Hasinger, G.,: 2005, in: UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV., Proceedings of the SPIE, Edited by Siegmund, Oswald H. W., Volume 5898, pp. 438-451
X-RED: a satellite mission concept to detect early universe gamma ray bursts

Oskinova, L. M.: 2005, Mon. Not. R. Astron. Soc., 361, 679
Evolution of X-ray emission from young massive star clusters

Oskinova, L. M.: 2005, in: Proceedings of "Massive Stars and High-Energy Emission in OB Associations", a workshop of the JENAM 2005, "Distant Worlds", held in Lige (Belgium), July 4 - 7, 2005, Eds. G. Rauw, Y. Naz, R. Blomme, and E. Gosset, p. 99 - 102
X-raying the super star clusters in the Galactic center

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Publications 2004

Brown J.C., Barrett R.K., Oskinova L.M., Owocki S.P., Hamann W.-R., de Jong J.A., Kaper L., Henrichs H.F.: 2004, Astron. Astrophys., 413, 959
Inference of hot star density stream properties from data on rotationally recurrent DACs

Hamann, W.-R., Gräfener, G.: 2004, Astron. Astrophys., 427, 697
Grids of model spectra for WN stars, ready for use

Oskinova L., Feldmeier A., Hamann W.-R.: 2004, Astron. Astrophysics, 422, 675
X-ray emission lines from inhomogeneous stellar winds

Pena M., Hamann W.-R.: 2004, in: Compact Binaries in the Galaxy and Beyond. G. Tovmassian and E. Sion (eds.). Revista Mexicana de Astronomia y Astrofisica (Serie de Conferencias) Vol. 20. IAU Colloquium 194, p. 41
The central star of the planetary nebula LMC-N66: a massive accreting white dwarf?

Pena M., Hamann W.-R., Ruiz M.T., Peimbert A., Peimbert M.: 2004, Astron. Astrophys., 419, 583
A high resolution spectroscopic study of the extraordinary planetary nebula LMC-N66

Pena M., Peimbert A., Hamann W.-R., Ruiz M.T., Peimbert M.: 2004, in: Asymmetric Planetary Nebulae III. ASP Conf. Ser., 313, p. 131
The extraordinary planetary nebula N66 in the LMC

Stasinska G., Gräfener G., Pena M., Hamann W.-R., Koesterke L., Szczerba R.: 2004, Astron. Astrophys., 413, 329
Comprehensive modelling of the planetary nebula LMC-SMP 61 and its [WC]-type central star

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Publications 2003

Hamann, W.-R., Gräfener, G.: 2003, Astron. Astrophys., 410, 993
A temperature correction method for expanding atmospheres

Hamann, W.-R., Gräfener, G.: 2003, in: Astronomische Nachrichten Suppl. Issue 2,
Vol. 324, p. 21

The Surface Composition of Hydrogen-deficient Post-AGB Stars

Hamann, W.-R., Pena, M., Gräfener, G., Ruiz, M.T.,: 2003, Astron. Astrophys., 409, 969
The central star of the planetary nebula N66 in the Large Magellanic Cloud: A detailed analysis of its dramatic evolution 1983 - 2000

Ignace, R., Oskinova L., M. and Brown, J. C.: 2003, Astron. Astrophys., 408, 353
XMM-Newton Observations of the Nitrogen-Rich Wolf-Rayet star WR1

Nikutta, R.: 2003, Diplomarbeit an der Universität Potsdam
Strahlungskopplung in nichtmonotonen Geschwindigkeitsfeldern der Winde massereicher Sterne

Oskinova, L. M.; Brown, J. C.: 2003, in: Sun Kwok, Michael Dopita, and Ralph Sutherland (eds.), Planetary Nebulae: Their Evolution and Role in the Universe, Proceedings of the 209th Symposium of the International Astronomical Union held at Canberra, Australia, ASP Conf. Series, 2003, p. 425
X-ray Aureola of Central Stars

Oskinova L., M., Ignace, R., Hamann W.-R., Pollock, A. M. T., Brown, J. C.: 2003, Astron. Astrophysics, 402, 755
The Conspicuous Absence of X-ray Emission from Carbon-Enriched Wolf-Rayet Stars

Feldmeier A., Oskinova L., Hamann W.-R.: 2003, Astron. Astrophysics, 403, 217
X-ray line emission from a fragmented stellar wind

Feldmeier A., Oskinova L., Hamann W.-R., Owocki S.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p. 56
Overloaded and Fractured Winds

Gräfener G., L. Koesterke, Hamann W.-R.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p. 714
The WR population in CTS 1026

Gräfener G., Hamann W.-R.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p. 190
Hydrodynamic model atmospheres for hot stars

Gräfener G.: 2003, in: I. Hubeny, D. Mihalas and K. Werner, (eds.), Stellar Atmosphere Modelling, ASP Conference Series, Vol. 288, p. 533
Hydrodynamic atmosphere models for hot stars

Hamann W.-R.: 2003, in: I. Hubeny, D. Mihalas and K. Werner, (eds.), Stellar Atmosphere Modelling. ASP Conference Series, Vol. 288, p. 171
Basic ALI in Moving Atmospheres

Hamann W.-R., Gräfener G., Koesterke L.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p. 198
Wolf-Rayet star parameters from spectral analyses

Hamann W.-R., Gräfener G., Koesterke L.: 2003, in: S. Kwok, M. Dopita and R. Sutherland, (eds.), Planetary Nebulae: Their Evolution and Role in the Universe. Proc. IAU Symp. 209, p. 203
WR Central Stars

Oskinova L., Feldmeier A., Hamann W.-R.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p 214
X-ray line profiles from structured stellar winds

Langer N., Wellstein S., Petrovic J.: 2003, in: K.A. van der Hucht, A. Herrero and D. Esteban, (eds), A Massive Star Odyssey, from Main Sequence to Supernova. Proceedings IAU Symposium No 212, p. 275
On the Evolution of Massive Close Binaries

Gräfener G., Hamann W.-R., Pena M.: 2003, in: S. Kwok, M. Dopita and R. Sutherland, (eds.), Planetary Nebulae: Their Evolution and Role in the Universe. Proc. IAU Symp. 209, p. 577
Spectral analysis of the LMC [WC] star SMP 61

Pena M., Hamann W.-R., Ruiz M. T.: 2003, in: S. Kwok, M. Dopita and R. Sutherland, (eds.), Planetary Nebulae: Their Evolution and Role in the Universe. Proc. IAU Symp. 209, p. 579
The LMC planetary nebula N66 revisited. Nebular kinematics and stellar models

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Publications 2002

Feldmeier A.: Habilitation thesis in Astrophysics, Potsdam University
Hydrodynamics of astrophysical winds driven by scattering in spectral lines

Feldmeier A., Shlosman I.: 2002, Astrophysical Journal, 564, 385
Abbott Wave-Triggered runaway in Line Driven Winds from Stars and Accretion Disks

Feldmeier A., Shlosman I., Hamann W.-R.: 2002, Astrophysical Journal, 566, 392
Runaway Acceleration of Line Driven Winds: the Role of the outer Boundary

Fryer, C. L., Langer N., Heger A., Wellstein S.: 2002, Astrophysical Journal, 578, 335
The Limiting Stellar Initial Mass for Black Hole Formation in Close Binary

Gräfener G., Koesterke L., Hamann W.-R.: 2002, Astron. Astrophys., 387, 244
Line-blanketed model atmospheres for WR stars

Hamann W.-R., Koesterke L., Gräfener G.: 2002, in: Anthony F.J. Moffat und Nicole St.-Louis, (eds.), Interacting Winds from Massive Stars. ASP Conference Series, Vol. 260, p. 175
Spectral analyses of Wolf-Rayet winds

Ignace, R., Oskinova L., M., Pollock, A. M. T., Brown, J. C., Hamann W.-R.: 2002, in: American Astronomical Society Meeting 201
X-rays from Wolf-Rayet Stars

Koesterke L., Hamann W.-R.: 2002, in: Anthony F.J. Moffat und Nicole St.-Louis, (eds.), Interacting Winds from Massive Stars. ASP Conference Series, Vol. 260, p. 259
[WC]-type CSPN: Clumping and wind-driving

Koesterke L., Hamann W.-R., Gräfener G.: 2002, Astron. Astrophys., 384, 562
Expanding atmospheres in non-LTE: Radiation Transfer using Short Characteristics

Langer N., Yoon S.-C., Wellstein S., Scheithauer S..: 2002, in: The Physics of Cataclysmic Variables and Related Objects, ASP Conference Proceedings, Vol. 261. Edited by B.T. Gänsicke, K. Beuermann, and K. Reinsch. ISBN: 1-58381-101-X. San Francisco: Astronomical Society of the Pacific, 2002, p. 252.
On the evolution of interacting binaries which contain a white dwarf

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Publications 2001

Hamann W.-R., Brown J.C., Feldmeier A. and Oskinova L.M.: 2001, Astron. Astrophys., 378, 946
On the wavelength drift of spectral features from structured hot star winds

Herwig F.: 2001, Astrophysics and Space Science 275, p. 15
Internal mixing and surface abundance of [WC]-CSPN

Herwig F.: 2001, in: "Post-AGB objects as a phase of stellar evolution" R.Szczerba & S.K.Gorny (eds.), Astrophysics and Space Science Library (ASSL) series, 249H
Stellar evolution and nucleosynthesis of Post-AGB-Stars

Herwig F., Langer N.: 2001, in: Salting the early soup: trace nuclei from stars to the solar system. edited by M. Busso and R. Gallino. Memorie della Societ Astronomica Italiana, (ISSN 0037-8720), Vol. 72, N. 2, p. 277-287
Formation of the Neutron Donor 13C in AGB stars by overshoot and roation

Koesterke L.: 2001, Astrophysics and Space Science 275, p. 41
Spectral analyses of WR-type central stars of Planetary Nebulae

Koesterke L., Hamann W.-R., Urrutia T.: 2001, Astron. Astrophys., 379, 224
Line-Profile Variability in the Wolf-Rayet Stars WR 135 and WR 111

Langer N., Wellstein S., Heger A.: 2001, in: The influence of binaries on stellar population studies, Dordrecht: Kluwer Academic Publishers, 2001, xix, 582 p. Astrophysics and space science library (ASSL), Vol. 264. ISBN 0792371046, p.273
Massive Single and Binary Star Models: A Comparison

Langer N., Heger, A., Herwig, F., Wellstein S.: 2001, in: Tours Symposium on Nuclear Physics IV. AIP Conference Proceedings Volume 561, ISBN 1-56396-996-3. Edited by M. Arnould et al.. Published by the American Institute of Physics, Melville, New York, 2001, p.3
Mixing and Thermonuclear Processes in Stars

Wellstein S.: 2001, Thesis, Univ. Potsdam
Präsupernovaentwicklung enger massereicher Doppelsternsysteme

Wellstein S., Langer N., Braun H.: 2001, Astron. Astrophys., 369, p. 939
Formation of contact in massive close binaries

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Publications 2000

Garcia-Segura, G., Franco, J., Lopez, J. A., Langer N., Rozyczka: 2000, in: "Asymmetrical Planetary Nebulae II: From Origins to Microstructures", ASP Conference Series, J. H. Kastner, N. Soker u. S. Rappaport, eds., p. 210
MHD Models for Planetary Nebulae

Gräfener G., Hamann W.-R., Koesterke L.,: 2000, in: Thermal and Ionization Aspects of Flows from Hot Stars: Observations and Theory, Henny J.G.L.M. Lamers, and Arved Sapar (eds.), ASP Conference Series, Vol. 204, p. 215
The impact of iron group elements on the ionization structure of WC star atmospheres: WR111

Hamann W.-R., Koesterke L.: 2000, Astron. Astrophys., 360, 647
WN stars in the LMC: parameters and atmospheric abundances

Hamann W.-R., Koesterke L., Gräfener G.: 2000, in: Thermal and Ionization Aspects of Flows from Hot Stars: Observations and Theory, Henny J.G.L.M. Lamers, and Arved Sapar (eds.), ASP Conference Series, Vol. 204, p. 197
Non-LTE models of WR winds

Heger, A., Langer, N., Woosley, S. E.: 2000, Astrophysical Journal, 528, 368
Presupernova Evolution of Rotating Massive Stars I: Numerical Method and Evolution of the Internal Stellar Structure

Heger, A., Woosley, S. E., Langer, N.: 2000, in: "The Interplay Between Massive Stars and the ISM", Eds. D. Schaerer. R. Gonzalez Delgado, New Astronomy Reviews 44, p. 297
Stellar Models including pre-SN/SN phases

Herwig F.: 2000, in: Astron. Astrophys., 360, 952
The evolution of AGB stars with convective overshoot

Herwig F.: 2000, in: "Sakurai's Object: What have we learned in the first five years?" Nye Evans & Barry Smalley (eds.), Astrophysics and Space Science 279, 103
Modeling the evolution of Sakurai's object

Herwig F., Langer N.: 2000, in: "Nuclear Physics A", International Conference Nuclei in the Cosmos 2000, June 27 - July 1, Aarhus, Danmark
Convective proton and 3He ingestion into helium burning: Nucleosynthesis during a post-AGB thermal pulse

Herwig F., Langer N.: 2000, in: "Salting the Early Soup: Trace Nuclei from Stars to the Solar System", Torino-Melbourne-Pasadena Workshop in honour of Prof. Gerald J. Wasserburg
Formation of the Neutron Donor 13C in AGB Stars Overshoot and Rotation

Koesterke L., Gräfener G., Hamann W.-R.: 2000, in: Thermal and Ionization Aspects of Flows from Hot Stars: Observations and Theory, Henny J.G.L.M. Lamers, and Arved Sapar (eds.), ASP Conference Series, Vol. 204, p. 239
The structure of iron-blanketed WR atmospheres

Langer N., Deutschmann A., Wellstein S., Höflich P.: 2000, Astron. Astrophys., 362, p. 1046
The evolution of main sequence star + white dwarf binary systems towards Type Ia Supernovae

Lugaro M., Herwig F.: 2000, in: "Nuclear Physics A", International Conference Nuclei in the Cosmos 2000, June 27 - July 1, Aarhus, Danmark
Advances in s-process models

Scheithauer, S.: 2000, Diplomarbeit an der Universität Potsdam
Helium Akkretion auf C/O-Weiße Zwerge

Wellstein S., Langer N.: 2000, in: Proceedings of ESO workshop: Black Holes in Binaries and Galactic Nuclei their Diagnostics, Demography and Formation, p. 295
Constraints on the initial mass limit for black hole information from the massive X-ray binary Wray 977

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Publications 1999

Blöcker T., Driebe T., Herwig F.: 1999, in: Astronomische Gesellschaft Meeting Abstracts, 15, 25
AGB evolution with overshoot: hot bottom burning vs. dredge-up

Blöcker T., Herwig F., Driebe T.: 1999, in: International workshop on The Changes in Abundances in Asymptotic Giant Branch Stars,
AGB evolution with overshoot: hot bottom burning and dredge-up

Chin Y., Henkel C., Langer N., Mauersberger R.: 1999, Astrophysical Journal Letters, 512, L143
The detection of extragalactic 15N: Consequences for nitrogen nucleosynthesis and chemical evolution

De Marco O., Schmutz W., Koesterke L., Hamann W.-R.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 227
Gamma2 Velorum revisited

De Marco O., Schmutz W., Koesterke L., Hamann W.-R., De Koter A.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 231
Why should we compare WR Codes?

Driebe T., Blöcker T., Schönberner and F. Herwig: 1999, in: Astron. Astrophys., 350, 89
The evolution of helium white dwarfs. II. Thermal instabilities

Garcia-Segura, G., Langer N., Rozyczka, M., Franco J.: 1999, Astrophysical Journal, 517, 767
Shaping Bipolar and Elliptical Planetary Nebulae: Effects of Stellar Rotation, Photoionization Heating and Magnetic Fields

Garcia-Segura, G., Langer N., Rozyczka, M., Franco J., Mac Low, M.-M.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 325
Hydrodynamics of Ring Nebulae: Magnetic vs. Non-Magnetic Hydro-Models

Gräfener G.: 1999, Dissertation
Spektralanalysen von WC-Sternen in der LMC

Gräfener G., Hamann W.-R., Koesterke L.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 240
Spectral analyses of WC stars in the LMC

Hamann W.-R., Koesterke L., Gräfener G.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 138
Modelling and quantitative analyses of WR spectra: recent progress and results

Herwig F.: 1999, in: "Low mass Wolf-Rayet stars: origin and evolution, Amsterdam
Internal mixing and surface abundance of [WC]-CSPN

Herwig F., Blöcker T.: 1999, in: "The Galactic Halo: From Globular Clusters to Field Stars", 35th Liège International Astrophysics Colloquium
Overshoot in giant stars

Herwig F., Blöcker T., Driebe T.: 1999, in: International workshop on The Changes in Abundances in Asymptotic Giant Branch Stars
TP-AGB evolution with overshoot for low-mass stars as a function of metallicity

Herwig F., Blöcker T., Schönberner D.: 1999, in: "Asymptotic Giant Branch Stars", IAU Symp. 191, PASP, p. 41
The role of convective boundaries

Herwig F., Blöcker T., Langer N., Driebe T.: 1999, in: Astron. Astrophys., 349, L5
On the formation of hydrogen-deficient post-AGB stars

Hulbert S., Nota A., Clampin M. Leitherer C., Pasquali A., Langer N. and Schulte-Ladbeck R.: 1999, in: "Variable and non-spherical stellar winds in luminous hot stars", IAU Symp. 169, B. Wolf (ed.), Lecture Notes in Physics, Springer Verlag, p. 103
HST WEPCII Observations of the Inner HR Car Nebula

Koesterke L., Hamann W.-R., Gräfener G.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 248
Inhomogeneities in Wolf-Rayet atmospheres

Langer N.: 1999, in: "Variable and non-spherical stellar winds in luminous hot stars", IAU Symp. 169, B. Wolf (ed.), Lecture Notes in Physics, Springer Verlag, in 359
The Evolution of Non-Spherical and Non-Stationary Winds of Massive Stars

Langer N., Heger A.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 187
Evolution and Explosion of Wolf-Rayet Stars

Langer, N., Garcia-Segura, G., Mac Low, M.-M.: 1999, Astrophysical Journal Letters, 520, L49
Giant Outbursts of Luminous Blue Variables and the Formation of the Homunculus Nebula Around Eta Carinae

Langer N., Heger A., Wellstein S., Herwig F.: 1999, Astron. Astrophys., 346, L37
Mixing and nucleosynthesis in rotating TP-AGB stars

Pasquali, A., Nota, A., Langer, N., Schulte-Ladbeck, R. E., Clampin, M.: 1999, Astrophysical Journal, 119, p. 1352
R4 and its circumstellar nebula: evidence for a binary merger?

Pena M., Stastinska G., Esteban C., Koesterke L., Medina S., Kingsburgh R.: 1999, in: K.A. van der Hucht, G. Königsberger und P.R.J. Eenens (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. 193 (San Francisco: ASP), p. 382
Spectroscopy of planetary nebulae with [WR] nuclei

Wellstein S., Langer N.: 1999, Astron. Astrophys., 350, 148
Implications of massive close binaries for black hole formation and supernovae

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Publications 1998

Deutschmann A.: 1998, Diplomarbeit an der Universität Potsdam
Zur Metallizitätsabhängigkeit der Entwicklung von Typ Ia Supernova-Vorläufersystemen

Dreizler S., Werner K., Rauch T., Reid I. N., Heber U., Koesterke L.,: 1998, in: Proceedings of IAU Symposium 189 on Fundamental Stellar Properties: The Interaction between Observation and Theory, edited by T. R. Bedding, A. J. Booth and J. Davis, Kluwer, Dordrecht, p. 369
NLTE Analyses of PG 1159 stars: Constraints for the Structure and Evolutiuon of Post-AGB stars

Driebe T., Blöcker T., Herwig F., Schönberner D.: 1998, in: Astronomische Gesellschaft Meeting Abstracts
Diffusive overshooting in hot bottom burning AGB models

Driebe T., Schönberner D., Blöcker T., Herwig F.: 1998, in: Astron. Astrophys., 339, 123
The evolution of helium white dwarfs. I. The companion of the millisecond pulsar PSR J1012+5307

Figer D. F., Najarro F., Langer N.: 2000, in: "Unsolved Problems in Stellar Evolution", proceeding of the 1998 Space Telescope Science Institute May Symposium, Cambridge University Press: Space Telescope Institute symposium series, vol. 12, p. 272
The Pistol Star and Massive Stars in the Galactic Center

Figer D. F., Najarro F., Morris M, McLean I. S., Geballe T. R., Ghez A. M., Langer N.: 1998, Astrophysical Journal, 506, 384
The Pistol Star

Garcia-Segura, G, Langer, N., Rozyczka, M, Mac Low, M.-M., Franco, J.,: 1998, in proc. 6th Texas-Mexico Conference on Astrophysics on Astronomical Plasmas - Near and Far, S. Torres-Peimbert, R. Dufour, (eds.), RevMexAA, Vol. 7, p. 50
The effects of rotation and stellar magnetic fields on the nebular shapes: LBV nebulae and PNe

Gräfener G., Hamann W.-R., Hillier D. J., Koesterke L.: 1998, Astron. Astrophys., 329, 190
Spectral analyses of WC stars in the LMC

Hamann W.-R., Koesterke L.: 1998, Astron. Astrophys., 335, 1003
Spectrum formation in clumped stellar winds: consequences for the analyses of Wolf-Rayet spectra

Hamann W.-R., Koesterke L.: 1998, Astron. Astrophys., 333, 251
The nitrogen spectra of Wolf-Rayet stars

Hamann W.-R., Koesterke L.: 1998, in: "Variable and non-spherical stellar winds in luminous hot stars", IAU Symp. 169, B. Wolf (ed.), Lecture Notes in Physics, Springer Verlag, 239H
Spectral analyses of Wolf-Rayet stars: the impact of clumping

Heger, A., Langer, N.: 1998, Astron. Astrophys., 334, 210
The spin-up of contracting red supergiants

Heger, A., Langer, N., Woosley, S. E.: 1998, in "Nuclear Astrophysics", Max-Planck-Institut für Astrophysik, MPA/P10 W. Hillebrandt, E. Müller eds., p. 14
Nucleosynthesis in rotating massive stars

Henkel C., Chin Y., Langer N., Mauersberger R.: 1998, in: proceeding ESO workshop on "Chemical Evolution form Zero to High Redshift", J. Mathis et al., eds, Lecture Notes in Physics, Springer Verlag, 103H
Detection of Extragalactic 15N: Nitrogen Nucleosynthesis and Chemical Evolution

Herwig F., Schönberner D., Blöcker T.: 1998, in: Astron. Astrophys., 340, L 43
On the validity of the core-mass luminosity relation for TP-AGB stars with efficient dredge-up


Herwig F., Schönberner D., Blöcker T.: 1998, in: "Asymptotic Giant Branch Stars", IAU Symp. 191, Abstract
Violation of the Core Mass - Luminosity Relation for AGB models which experience the third dredge-up

Koesterke L., Werner K.: 1998, Astrophysical Journal Letters, 500, 55
Determination of mass-loss rates of PG 1159 stars from FUV spectroscopy

Koesterke, L., Dreizler, S., Rauch, T.: 1998, Astron. Astrophys., 320, 1041
On the mass-loss of PG 1159 stars

Langer N.: 1998, Astron. Astrophys., 329, 551
Coupled mass and angular momentum loss of massive main sequence stars

Langer N., Heger A.: 1998, in proc. IAU Symposium 190 on "New Views of the Magellanic Clouds", Y.-H. Chu et al., eds., ASP conference seriese, San Francisco, 190-192L
Massive Star Evolution

Langer, N., Heger, A.,: 1998, in: Proceeding of Workshop on B[e] stars,
C. Jaschek, A. M. Hubert, (eds.), p. 235

B[e] supergiants: What is their evolutionary status?

Langer N., Braun H., Wellstein S.: 1998, in "Nuclear Astrophysics", W. Hillebrandt, E. Müller eds., p. 18
Massive close binaries as source of galactic 26Al

Langer N., Heger A., Garcia-Segura, G.: 1998, in Rev. Modern Astron. Vol. 11, p. 57
Massive stars: the pre-supernova evolution of internal and circumstellar strukture

Langer N., Heger A., Braun H.: 1998, in proceedings of the 2nd Oak Ridge Symposium on Atomic & Nuclear Astrophysics, IOP Publishing, T. Mezzacappa, ed., p. 377
Nucleosynthesis in massive stars

Langer N., Heger A., Woosley S.E., Herwig F.: 1998, in: "Nuclei in the Cosmos V", Ed. N. Prantzos, Edition Frontiers, Paris, p. 129
Nucleosynthesis in Rotating Stars

Leuenhagen, U., Hamann W.-R.: 1998, Astron. Astrophys., 330, 265
Spectral analyses of late-type [WC] central stars of planetary nebulae: more empirical constraints for their evolutionary status

Pena M., Stastinska G., Esteban C., Koesterke L., Medina S., Kingsburgh R.: 1998, Astron. Astrophys., 337, 866
Galactic planetary nebulae with Wolf-Rayet nuclei. I. Objects with [WC]-early type stars

Takahashi K., Faestermann T., Kienle P., Basch F., Langer N., Wagenhuber J.: 1998, in "Nuclear Astrophysics", W. Hillebrandt, E. Müller, eds., p. 175
The 187Re - 187Os Cosmochronometry and Chemical Evolution in the Solar Neighborhood

Wellstein S., Langer N.: 1998, In: A. Gimenez and B. Montesinos (eds.), Workshop on Stellar Structure Theory and Test of Convective Energy Transport, (San Francisco: ASP), p. 189
Convection and compact stellar remnants in massive close binaries

Werner K., Dreizler S., Rauch T., Koesterke L., Heber U.: 1998, in: "Asymptotic Giant Branch Stars", IAU Symp. 191
Born-again AGB stars: Starting point of the H-deficient post-AGB evolutionary sequence?

Werner K., Dreizler S., Rauch T., Barnstedt J., Göz M., Gringel W., Kappelmann N., Krämer G., Widmann H., Koesterke L., Haas S., Heber U., Appenzeller I., Grewing M.: 1998, in: Tagungsband Tromsö,
FUV spectroscopy of DO and PG 1159 stars with ORFEUS

Wittkowski M., Langer N., Weigelt G.: 1998, Astron. Astrophys., 340, L 39
Diffraction-limited Speckle-Masking Interferometry of the Red Supergiant VY CMa*

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Publications 1997

Hamann W.-R.: 1997, in: Planetary Nebulae, IAU Symp.180, H.J. Habing and H.J.G.L.M. Lamers (eds.), p. 91
Spectra of Wolf-Rayet type central stars and their analysis

Koesterke L., Hamann W.-R.: 1997, in: Planetary Nebulae, IAU Symp. 180, H.J. Habing and H.J.G.L.M. Lamers (eds.), p. 114
Quantitative spectral analyses of CSPNs of early [WC]-type

Pena M., Hamann W.-R., Koesterke L., Maza J., Mendez R.H., Peimbert M., Ruiz M.T., Torres-Peimbert S.: 1997, in: Planetary Nebulae, IAU Symp. 180, H.J. Habing and H.J.G.L.M. Lamers (eds.), p. 126
HST spectrophotometric data of the central star of the planetary nebula LMC-N66

Langer, N., Heger, A.,: 1997, in: Proceeding of 2nd Boulder-Munich Workshop on Hot Stars,
I. Howarth, (ed.), ASP Conf. Ser., 131, p. 76

The Evolution of Surface Parameters of Rotating Massive Stars

Pena M., Hamann W.-R., Koesterke L., Maza J., Mendez R.H., Peimbert M., Ruiz M.T., Torres-Peimbert S.: 1997, Astrophys. Journal, 491, 233-241
Spectrophotometric data of the central star of the large magellanic cloud planetary nebula N66. Quantitative analysis of its WN type spectrum.

Heger A., Jeannin L., Langer N., Baraffe L.: 1997, Astron. Astrophys., 327, 224
Pulsations in red supergiants with high L/M ratio

Woosley, S. E., Heger, A., Weaver A. T., Langer, N.: 1997, in: SN 1987 A - Ten Years After, M. M. Phillips, N. B. Suntzeff (eds.), PASPC (astro-ph/9705146)
SN 1987 A - Presupernova Evolution and the Progenitor Star

Koesterke L., Hamann W.-R.: 1997, Astron. Astrophys. 320, 91
Spectral analyses of central stars of planetary nebulae of early WC-type / NGC 6751 and Sanduleak 3

Langer, N.: 1997, in: Luminous Blue Variables, Massive Stars in Transition, ASP Conference Ser., A. Nota, H.J.G.L.M. Lamers (eds.), 120, 83
The Eddington limit in rotating massive stars

Langer N., Heger A., Fliegner J.: 1997, in: Fundamental Stellar Properties, Proc., IAU-Symp. 189, T. Bedding et al. (eds.), Kluwer, p. 343
Rotation: a fundamental parameter of massive stars

Osterbart R., Langer N., Weigelt G.: 1997, Astron. Astrophys. 325, 609
High-resolution imaging of the bipolar nebula Red Rectangle

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Publications 1996

Hamann W.-R.,Koesterke L.: 1996, in: Wolf-Rayet Stars in the Framework of Stellar Evolution, 33rd Liege International Astrophysical Colloquium, eds. J.M. Vreux et al., p. 491
Spectral Analyses with the Standard Model.
Part II: Wolf-Rayet Stars

Hamann W.-R.: 1996, Astrophysics and Space Science 238, 31
Spectral analysis and model atmospheres of WR type central stars

Hamann W.-R.: 1996, in Hydrogen-Deficient Stars, ASP Conference Series, Vol. 96, 1996, C.S. Jeffery and U. Heber (eds), p. 127
Wolf-Rayet stars of high and low mass

Leuenhagen U., Hamann W.-R., Jeffery C.S.: 1996, Astron. Astrophys. 312, 167
Spectral analyses of late type central stars of planetary nebulae

Werner. K.: 1996, in Röntgenstrahlung from the Universe, MPE Report 263, 205
X-ray emission from hot hydrogen-deficient white dwarfs

Werner K., Dreizler S., Heber U., Rauch T., Fleming T.A., Sion E.M., Vauclair G.: 1996, Astron. Astrophys., 307, 860
High resolution spectroscopy of two hot (pre-) white dwarfs with the Hubble Space Telescope. KPD 0005+5106 and RXJ 2117+3412

Werner. K.: 1996, Astron. Astrophys., 309, 861
Search for trace amounts of hydrogen in hot DO white dwarfs

Werner K., Wolff B., Pakull M.W., Cowley A.P., Schmidtke P.C., Hutchings J.B., Crampton D.: 1996, in Supersoft X-ray Sources, ed. J.Greiner, Lecture Notes in Physics, Springer, Berlin
Non-LTE model atmosphere analysis of the supersoft X-ray source RX J0122.9-7521

Werner K., Dreizler S., Heber U., Rauch T.: 1996, in Astrophysics in the Extreme Ultraviolet, IAU Colloquium 152, eds. S. Bowyer and R.F. Malina, Kluwer, p. 229
Confining the Edges of the GW Vir Instability Strip

Werner K., Dreizler S., Heber U., Rauch T.: 1996, in Hydrogen-Deficient Stars, The ASP Conference Series, Vol. 96, 1996, C.S. Jeffery and U. Heber (eds.), p. 267
PG 1159 Stars

Werner K.: 1996, Astrophys. Journal, 457, L 39
On the Balmer Line Problem

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Publications 1995

Barstow M.A., Holberg J.B., Koester D., Nousek J.A., Werner K.: 1995, In White Dwarfs, eds. D. Koester and K. Werner, Lecture Notes in Physics 443, Springer, Berlin, p. 302
Extreme Ultraviolet Spectroscopy of White Dwarfs

Hamann W.-R., Koesterke L., Wessolowski U.: 1995, Astron. Astrophys. Suppl. Ser. 113, 459
Spectral atlas of Galactic Wolf-Rayet stars (WN-sequence)

Hamann W.-R., Koesterke L., Wessolowski U.: 1995, Astron. Astrophys. 299, 151
Spectral analyses of the Galactic Wolf-Rayet stars: hydrogen-helium abundances and improved stellar parameters for the WN class

Koesterke L., Hamann W.-R.: 1995, Astron. Astrophys 299, 503
Spectral analyses of 25 Galactic Wolf-Rayet Stars of the carbon sequence

Werner K., Rauch T., Dreizler S., Heber U.: 1995, in Astrophysical Applications of Stellar Pulsation, IAU Colloquium 155, eds. R.S. Stobie and P.A. Whitelock, ASP Conference Series 83, p. 96
Confining the Edges of the GW Vir Instability Strip

Werner K., Dreizler S., Heber U., Rauch T., Wisotzki L., Hagen H.-J.: 1995, Astron. Astrophys. 293, L 75
Discovery of two hot DO white dwarfs exhibiting ultrahigh-excitation absorbtion lines

Werner K., Dreizler S., Heber U., Rauch T.: 1995, in Nuclei in Cosmos III, eds. M.Busso, R. Gallino, C.M. Raiteri, New York, American Institute of Physics Conference Proceedings 327, p. 45
Triple-alpha burning products on the surface of peculiar post-AGB stars

Werner K., Dreizler S., Wolff B.: 1995, Astron. Astrophys. 298, 567
Spectral analysis of the hot DO white dwarf PG 1034+001

Werner K.: 1995, Baltic Astronomy, 4, 340
Spectra of GW Vir pulsators

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