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Asteroseismic Analysis of Pulsating Subdwarf B Stars

Published online by Cambridge University Press:  12 April 2016

S. Charpinet ,
G. Fontaine  and
P. Brassard
S. Charpinet*
Affiliation:
LAT, Observatoire Midi-Pyrenees, Toulouse, France
G. Fontaine
Affiliation:
Département de Physique, Université de Montréal, Québec, Canada
P. Brassard
Affiliation:
Département de Physique, Université de Montréal, Québec, Canada
*
1 Postdoctoral Fellow, funded by the CNES, France; e-mail: scharpin@ast.obs-mip.fr

Abstract

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We briefly present a method to perform detailed asteroseismological analyses of pulsating subdwarf B (sdB) stars (also referred to as the EC14026 stars). We use a forward approach based on the computation of large grids of sdB stellar models (each model being analyzed with a linear nonadiabatic pulsation code) to derive, in an objective way, the most appropriate set of model parameters that can best reproduce the observed period spectrum of a given sdB pulsator. We discuss an illustrative application of this method to the pulsating sdB star PG 1047+003, for which we derive the fundamental parameters Teff, logg, Mtot, and Menv.

Type
Part 2.5. Pulsations in Compact Objects
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 364 - 367
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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