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Seismic Tests of Accretion in Central Stars of Planetary Systems

Published online by Cambridge University Press:  12 April 2016

Michaël Bazot  and
Sylvie Vauclair
Michaël Bazot
Affiliation:
Laboratoire d’Astrophysique, Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400Toulouse, France
Sylvie Vauclair
Affiliation:
Laboratoire d’Astrophysique, Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400Toulouse, France

Abstract

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Central stars of extra-solar planetary systems are metal-rich. Planet accretion or initial high metallicity are two models proposed to explain this observational fact that can be tested with asteroseismology. We calculate two stellar models, one with accretion and one with high initial metallicity, in order to obtain the same external parameters for both of them. We then compare their internal structures and their oscillation frequencies.

Type
Part 7. Chemical composition of variable stars
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 422 - 425
Copyright
Copyright © Astronomical Society of the Pacific 2004

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