Splinter Meeting HotStars

Hot Stars and Binary Evolution

Time: Thursday September 21, 14:00-16:30 and 17:00-19:00

Room: HS3

Organizers: Andreas Sander, Kerstin Weis, Veronika Schaffenroth

Hot stars dominate the galactic budget of ionizing photons and profoundly impact their environments. While typically associated with massive stars, e.g., OB-type stars, Wolf-Rayet stars, Red Supergiants, Luminous Blue Variables, even low-mass stars may develop high temperatures as they evolve beyond core-hydrogen burning to become Hot Subdwarfs, Central Stars of Planetary Nebula, and Hot White Dwarfs.

As if the physics of mass-loss by wind or erruptions, rotation, and magnetic fields weren't complicated enough - we are now forced to acknowledge the fact that the majority of stars are found in binary systems and a significant fraction of them will likely interact with companions during their lifetimes. Those interactions can be stable and steady mass transfer, but also rather short-lived and violent events like common envelope ejection or mergers. Also single stars can be the result of such interactions.

There is a multitude of evolutionary scenarios existing for binaries. But are they really successful in explaining our observations?

In this splinter, we want to discuss our current understanding of the evolution of hot stars in all phases of stellar evolution, focusing on the impact of binarity on their evolution.


14:00  Welcome

14:05  Andreas Sander:
Modeling hot star atmospheres: Challenges, applications, and the next generation

14:23  Rainer Hainich:
Massive binary stars with relativistic companions: Studying donor winds with the HST

14:41  Martin Quast:
Mass transfer evolution in high mass X-ray binaries

14:59  David Gruner:
An in-depth look into the earliest O-type Galactic binary, HD 93129A

15:17  Tomer Shenar:
Magnetic stars as a laboratory for constraining the weak-wind problem in massive stars

15:35  Denny Hoyer:
The giant-dwarf connection

15:53  Lisa Löbling:
Spectral Analysis of the hybrid PG 1159-type Central Stars of the Planetary Nebulae Abell 43 and NGC 7094

16:11  Helge Todt:
The Born-again Planetary Nebulae Abell 30 and Abell 78

16:30-17:00 Coffee Break & Poster Session (Foyer Physics)

17:00  Poster advertisement Conny Glaser:
Stellar Laboratories: High-precision Atomic Physics with STIS

17:02  Poster advertisement Michael Knörzer:
The enigma of the missing flux in the hot, helium-rich white dwarf RE 0503-289

17:04  Poster advertisement Tomer Shenar:
The formation of the observed Wolf-Rayet stars in the Magellanic Clouds is not dominated by mass transfer in binaries

17:07  Stephan Geier:
The catalog of hot subdwarf stars

17:25  Thomas Kupfer:
The population of ultracompact hot subdwarf binaries

17:43  Veronika Schaffenroth:
News from the EREBOS project

18:01  Felix Mackebrandt:
The stellar pulsation timing method to detect substellar companions

18:19  Sonja Schuh:
The O-C diagram of V391 Peg revisited: planet or not?

18:37  Marilyn Latour:
Spectral analysis of four very similar hot hydrogen-rich subdwarf O stars

Related contributions

PresentationTitleType PDF
GlaserStellar Laboratories: High-precision Atomic Physics with STISPoster PDF
KnörzerThe enigma of the missing flux in the hot, helium-rich white dwarf RE 0503-289Poster PDF
ShenarThe formation of the observed Wolf-Rayet stars in the Magellanic Clouds is not dominated by mass transfer in binariesPoster PDF