Reference : Asteroseismic probing of internal rotation in hot B subdwarf stars: Testing spin-orbi...
Scientific congresses and symposiums : Paper published in a journal
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Asteroseismic probing of internal rotation in hot B subdwarf stars: Testing spin-orbit synchronism in two close binary systems
Van Grootel, Valérie mailto [Université de Toulouse/Université de Montréal (UdeM) > > > >]
Charpinet, Stéphane [Laboratoire d'Astrophysique de Toulouse-Tarbes (LATT) > > > >]
Fontaine, Gilles [Université de Montréal - UdeM > > > >]
Brassard, Pierre [Université de Montréal - UdeM > > > >]
Reese, Daniel [University of Sheffield > Department of Applied Mathematics > > >]
Journal of Physics: Conference Series
Institute of Physics Publishing IOP)
Yes (verified by ORBi)
United Kingdom
16th European White Dwarfs Workshop
du 30 juin au 4 juillet 2008
[en] We present internal rotation profiles derived from asteroseismology for the hot pulsating B subdwarf stars PG 1336-018 and Feige 48. These two pulsators are primaries of close binary systems of known orbital period and, therefore, provide laboratories to test, for the first time, spin-orbit synchronization as a function of depth. We show that PG 1336-018 and Feige 48 clearly rotate as solid bodies with periods equal to their orbital periods from the surface down to at least ~ 0.5 and ~ 0.3 their radius, respectively. Deep tidal locking has therefore developed within the relatively short lifetime of these stars (~ 10^8 yr).

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