FNWI --- IMAPP Department of Astrophysics
Radboud University > Faculty of Science > Department of Astrophysics

Abstract for the seminar speaker Stephan Geier, Tuesday December 2nd 4pm.

Hot subdwarfs - Small stars indicating major events in stellar evolution

Abstract: Hot subdwarf stars are regarded as the bare helium cores of red giants that lost almost their entire hydrogen envelope. The formation of these objects is still unclear since it requires an episodes of extreme mass loss, which is likely triggered by interactions with other objects. The formation of hot subdwarfs turned out to be connected to phenoma as diverse as the interactions of stars and planets, stellar mergers or even the origin of type Ia supernovae. I will review the state-of-the-art in hot subdwarf research and highlight the relevance of those small stars for the late phase of stellar evolution.