Accueil > Séminaires d’Astrophysique > Asteroseismology in Action - Probing the Interiors of Extreme Horizontal Branch Stars

 

Asteroseismology in Action - Probing the Interiors of Extreme Horizontal Branch Stars

Suzanna Randall (ESO, Garching)

Par Stephane Charpinet - 25/01/2007

 

Séminaires d’Astrophysique

de l’Observatoire Midi-Pyrénées


Séminaire de

Suzanna RANDALL

 (ESO, Garching)


Jeudi 1er Février 2007 à 11h

OMP - Salle Coriolis


Asteroseismology in Action - Probing the Interiors of Extreme Horizontal Branch Stars

The formation of Extreme Horizontal Branch (EHB) stars constitutes one of the last grey areas in stellar evolution theory. While a number of competing theories have been proposed, their accuracy is difficult to test using conventional means. Fortunately, some of these stars exhibit non-radial pulsations that can be exploited to reveal their internal structure and hence constrain evolutionary scenarios. Such asteroseismological analyses have been particularly successful for short-period variable subdwarf B stars, to the extent where evolutionary trends are beginning to emerge. I will explain the techniques and methods employed in EHB star asteroseismology, present recent results for different types of pulsator, and discuss outstanding issues and current research in the field.

 

 

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Laboratoire Astrophysique de Toulouse - Tarbes (UMR5572)

CNRS (Midi-Pyrénées)

Univ. Paul Sabatier

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