Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology. The case of hot B subdwarfs

摘要: Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology Page 1 Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology Valerie Van Grootel (University of Liege) S. Charpinet (IRAP Toulouse), G. Fontaine (U. Montreal), P. Brassard (U. Montreal), and EM Green (U. Arizona) PLATO 2.0 Science Workshop The case of hot subdwarf B stars Page 2 Valérie Van Grootel – Plato 2.0 workshop 2013 2 1. Introduction to hot subdwarf B (sdB) stars Hot (T eff = 20 000 - 40 000 K) and compact (log g = 5.2 - 6.2) stars • Core He-burning, extremely thin H envelope • sdBs are thought to be post-red giants having lost most of their H-envelope through binary interaction (stellar, sub-stellar and planets →see R. Silvotti’s talk) • p-mode and g-mode pulsators (15 observed by Kepler and 1 by Corot) • To date: 15 sdB pulsators modeled by seismology Mass …