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The Delta Scuti Star GX Pegasi: A Theoretical Investigation of its Power Spectrum

Published online by Cambridge University Press:  12 April 2016

E. Michel ,
M. J. Goupil ,
Y. Lebreton  and
A. Baglin
E. Michel
Affiliation:
Observatorie de Paris, DASGAL, URA CNRS 335, France
M. J. Goupil
Affiliation:
Observatorie de Paris, DASGAL, URA CNRS 335, France
Y. Lebreton
Affiliation:
Observatorie de Paris, DASGAL, URA CNRS 335, France
A. Baglin
Affiliation:
Observatorie de Paris, DASGAL, URA CNRS 335, France

Extract

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Target of a STEPHI multisite campaign, the Delta Scuti star GX Pegasi has been found to oscillate with at least five simultaneous, close frequencies (table I).

Mode identification together with informations about the star that such an identification can provide are outlined below (see also Michel et al, 1992b).

The mode identification is carried out by means of a comparison between the observed frequencies and the adiabatic frequencies of models appropriate to this star. Models that match GX Peg’s position in a Hertzsprung-Russell diagram have masses in the range 1.9 – M⊙. When included, convective core overshoot is handled as in Maeder and Meynet (1989). According to these models, GX Peg is a rather evolved, main sequence star.

Type
II. Observational Facts
Information
International Astronomical Union Colloquium , Volume 134: Nonlinear Phenomena in Stellar Variability , 1993 , pp. 181 - 183
Copyright
Copyright © Kluwer 1993

References

Christensen-Dalsgaard, J: 1982, Monthly Notices of the RAS 199, 735.CrossRefGoogle Scholar
Christensen-Dalsgaard, J. and Gough, D.O.: 1982, Monthly Notices of the RAS 198, 141.CrossRefGoogle Scholar
Dziembowski, W.A. and Goode, P.R.: 1992, preprint.Google Scholar
Dziembowski, W.A. and Krolikowska, M.: 1990, Acta Astron. 40, 19.Google Scholar
Dziembowski, W.A. and Pamyatnvkh, A.A.: 1991, Astronomy and Astrophysics 248, L11.Google Scholar
Lee, U.: 1985, Publications of the ASJ, 37, 279.Google Scholar
Maeder, A. and Meynet, G.: 1989, Astronomy and Astrophysics 210, 155.Google Scholar
Michel, E. et al.: 1992a, Astronomy and Astrophysics, in press.Google Scholar
Michel, E., Goupil, M.J., Lebreton, Y., and Baglin, A.: 1992b, Astronomy and Astrophysics. in prep.Google Scholar
Rogers, F.J. and Iglesias, C.A.: 1991, preprint.Google Scholar
Saio, H.: 1981, Astrophysical Journal 244, 299.CrossRefGoogle Scholar