[en] The evolved, core helium burning, extreme horizontal branch stars (also known as hot B subdwarfs) host several classes of pulsators showing either p- or g-modes, or both. They offer particularly favorable conditions for probing with asteroseismology their internal structure, thus constituting arguably the most interesting seismic window for this intermediate stage of stellar evolution. G-modes in particular have the power to probe deep inside these stars, down to the convective He-burning core boundary where uncertain physics (convection, overshooting, semi-convection) is at work. Space data recently obtained with CoRoT and Kepler are offering us the possibility to probe these regions in detail and possibly shed new light on how these processes shape the core structure. In this short paper, we present the most recent advances that have taken place in this field and we provide hints of the foreseen future achievements of hot subdwarf asteroseismology.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Charpinet, Stéphane; CNRS, UPS-OMP, Université de Toulouse, Toulouse, France
Van Grootel, Valérie ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Fontaine, G.; Département de Physique, Université de Montréal, Montréal, Canada
Brassard, P.; Département de Physique, Université de Montréal, Montréal, Canada
Randall, S. K.; ESO, Garching bei München, Germany
Green, E. M.; Steward Observatory, University of Arizona, Tucson, AZ, USA)
Language :
English
Title :
Pulsations in hot subdwarf stars: recent advances and prospects for testing stellar physics
Publication date :
2016
Event name :
IAU XXIX General Assembly
Event place :
Honolulu, United States
Event date :
3-14 August 2015
By request :
Yes
Audience :
International
Journal title :
Proceedings of the International Astronomical Union