Multicomponent stellar wind from hot subdwarfs stars
V. Votruba1,3 A. Feldmeier2 J. Krticka1, J. Kubat3,
2Institut für Physik und Astronomie, Universität Potsdam, Germany
3Astronomicky ustav, Akademie ved Ceske republiky, Ondrejov, Czech Republic
Stellar wind from hot subdwarf stars is mainly accelerated
by the interaction of ultraviolet photospheric radiation
with metals, mainly oxygen. Absorbing ions share
momentum through Coulombic collisions with the remaining
passive part of the plasma (namely protons). We found
that in the case of the winds from hot subdwarfs, interactions
could be so small that they stop the momentum transfer between
the passive bulk of plasma and absorbing ions. As a
result wind decouples at a certain point.
Display PostScript file
(local users only!)
Fetch Pdf-File (votruba-etal-2010.pdf, 221kB)
Fetch PostScript-File (votruba-etal-2010.ps, 0.6MB, uncompressed)
Fetch PostScript-File (votruba-etal-2010.ps.gz, 180kB, compressed)