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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

References

Bouchy, F., Carrier, F. 2002 A&A, 390, 205 Google Scholar
Brassard, P., Pelletier, C., Fontaine, G., Wesemael, F. 1992 ApJS, 80, 725 CrossRefGoogle Scholar
Gough, D.O. 1990 Lect. Notes Phys., Vol. 367: Progress of Seismology of the Sun and Stars, 283 Google Scholar
Murray, N., Chaboyer, B., Arras, P., Hansen, B., Noyes, R.W. 2001 ApJ, 555, 801 Google Scholar
Santos, N.C., Israelian, G., Mayor, M. 2001 A&A, 373, 1019 Google Scholar
Santos, N.C., Israelian, G., Mayor, M., Rebolo, R., Udry, S. 2003 A&A, 398, 363 Google Scholar
Ulrich, R.K. 1986 ApJ, 306, L37 CrossRefGoogle Scholar