In order to attend the O-MESS, please subscribe to our mailing list. We will send out the Zoom invitation the day before each O-MESS.

Below you can find the program of our meetings. The O-MESS will take place bi-weekly on alternate Tuesday and Wednesdays. The first two O-MESS will take at 16:00 Central European Time (CET), the following O-MESS at 16:00 Central European Summer Time (CEST) to enable the largest possible global participation. In exceptional cases when e.g. these times are not convenient for the schedule speaker, we might reschedule the seminar to another time. Please check this page regularly for updates.

At what time will O-MESS take place in my city?

This is a good question! Not all countries switch to daylight saving time at the same time, and others do not at all. You can use e.g. this Time Zone Converter to find out at what local time O-MESS will take place. In the E-mail with the Zoom invitation, which will be sent out the day before each O-MESS, we will also include local times for major cities to help avoiding confusion.

March 9
O-MESS I (Chair: Nicole Reindl)
16:00-16:25 Ultra-massive white dwarf models (abstract)
Maria Camisassa (University of Colorado)
16:25-16:50 Collisions in white dwarf debris discs (abstract)
Andrew Swan (University College London)
16:50-17:05 coffee break
March 24
O-MESS II (Chair: Roberto Raddi)
16:00-16:25 Asteroseismology of pulsating subdwarf B stars using TESS data (abstract)
Sumanta Kumar Sahoo (Pedagogical University of Krakow)
16:25-16:50 The first volume limited sample of cataclysmic variables from Gaia DR2 (abstract)
Anna Pala (ESO)
16:50-17:20 coffee break
April 6
O-MESS III (Chair: Roberto Raddi)
16:00-16:25 Carbon-rich dust in the evolved born-again planetary nebulae A30 and A78 (abstract)
Jesús Alberto Toalá (UNAM)
16:25-16:50 The Seismic Technique for Obtaining Fundamental White Dwarf Parameters (abstract)
Keaton J. Bell (University of Washington)
16:50-17:20 coffee break
April 21
O-MESS IV (Chair: Marcelo Miller Bertolami)
16:00-16:25 Outbursts in AM CVns: peculiarities and their importance in the survey era (abstract)
Liliana Rivera Sandoval (University of Alberta)
16:25-16:50 Element transport in evolutionary models: A new look at the spectral evolution of white dwarfs (abstract)
Antoine Bédard (Université de Montréal)
16:50-17:20 coffee break
May 4
O-MESS V (Chair: Nicole Reindl)
16:00-16:25 The white dwarf binary pathways survey IV (abstract)
Mercedes Stephania Hernandez (Universidad de Valparaíso)
16:25-16:50 A test of the planet-star unipolar inductor for magnetic white dwarfs (abstract)
Nikolay Walters (University College London)
16:50-17:20 coffee break
May 19
O-MESS VI (Chair: Ingrid Pelisoli)
16:00-16:25 Modelling short-period sdB binaries with MESA (abstract)
Alexey Bobrick (Lund Observatory)
16:25-16:50 Short period cataclysmic variables with strange white dwarf colours (abstract)
James Wild (University of Sheffield)
16:50-17:20 coffee break
June 1
O-MESS VII (Chair: Ingrid Pelisoli)
16:00-16:25 Too small to last: the tiniest white dwarf and other stories (abstract)
Ilaria Caiazzo (California Institute of Technology)
16:25-16:50 Predicting Surface Variability of White Dwarfs Accreting Planetary Debris (abstract)
Tim Cunningham (University of Warwick)
16:50-17:20 coffee break
June 16
O-MESS VIII (Chair: Roberto Raddi)
16:00-16:25 WD1856b: a close giant planet around a white dwarf that could have survived a common-envelope phase (abstract)
Felipe Lagos (Universidad de Valparaíso)
16:25-16:50 Successive Common Envelope Events from Multiple Planets (abstract)
Luke Chamandy (University of Rochester)
16:50-17:20 coffee break
June 29
O-MESS IX (Chair: Nicole Reindl)
16:00-16:25 Accreting white dwarfs: H and He novae. (abstract)
Alexander Kemp (Monash University)
16:25-16:50 Pieces of the Planetary Nebula Puzzle with Gaia (abstract)
Nick Chornay (University of Cambridge)
16:50-17:20 coffee break
July 14
O-MESS X (Chair: Ingrid Pelisoli)
16:00-16:25 Characterization of the Galactic double white dwarf population, and its implications to LISA (abstract)
Na'ama Hallakoun & Valeriya Korol (Weizmann Institute of Science / University of Birmingham)
16:25-16:50 Transiting Planetary Debris in the Era of Large Time-Domain Surveys (abstract)
Zach Vanderbosch (University of Texas Austin & McDonald Observatory)
16:50-17:20 coffee break
July 27
O-MESS XI (Chair: Marcelo Miller Bertolami)
16:00-16:25 Extrasolar Planetesimal Lithium Pollution of White Dwarfs as a Tracer of Galactic Lithium Evolution (abstract)
Ben Kaiser (University of North Carolina)
16:25-16:50 Hot subdwarfs with cool low-mass companions observed from space (abstract)
Veronika Schaffenroth (Universität Potsdam)
16:50-17:20 coffee break