Reference : Sounding the cores of stars by gravity-mode asteroseismology
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Sounding the cores of stars by gravity-mode asteroseismology
Van Grootel, Valérie mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Charpinet, Stéphane [ > > ]
Fontaine, Gilles [ > > ]
Randall, Suzanna K [ > > ]
Brassard, Pierre [ > > ]
Green, Elizabeth M [ > > ]
Geophysical and Astrophysical Internal Waves
du 7 au 11 février 2011
Ecole de Physique des Houches
Les Houches
[en] Asteroseismology is a recent branch of astrophysics that studies the interiors of stars by the interpretation of their pulsation spectra. A wide variety of stars exhibit pulsations, including gravity-modes (driven by buoyancy) that usually penetrate deep inside the stars. By probing these deep layers unreachable from classical observations, the g-mode oscillations bring invaluable information for stellar evolution and astrophysics in general.

I will illustrate in my talk the power of g-mode asteroseismology by the example of Extreme Horizontal Branch stars, that are on an intermediate stage of evolution, and show how g-modes allow us to determine the properties of the cores in these stars, including their convective characteristics, size and composition.

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