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Let Us Begin by Modelling Two Observed Delta Scuti Stars Simultaneously

Published online by Cambridge University Press:  12 April 2016

E. Michel ,
M.J. Goupil  and
Y. Lebreton
E. Michel
Affiliation:
Observ. de Paris-Meudon, URA 335, DASGAL, 92195 Meudon, France.
M.J. Goupil
Affiliation:
Observ. de Paris-Meudon, URA 335, DASGAL, 92195 Meudon, France.
Y. Lebreton
Affiliation:
Observ. de Paris-Meudon, URA 335, DASGAL, 92195 Meudon, France.

Abstract

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We consider here two Delta Scuti stars GX Pegasi and V650 Tauri, which show very close masses and evolution stages as infered from photometrical calibration. The se two stars have been observed by the STEPHI team (Michel et al. 1990, Belmonte et al. this procedings) and they appear to be multiperiodic pulsators. For both these stars, an identification of the observed frequencies is proposed, from comparison with adiabatic eigenfrequencies computed for well suited stellar mode ls. This interpretation reveals very different pulsational behaviors despite the sta rs are expected to present very similar internal structures. We report here a first step toward constraining models by improving the fit between the observed and the calculated eigenfrequencies. The effect of overshooting and of the recent enhancement of the opacities are i nvestigated.

Type
VI. Asteroseismology: theory
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 547 - 549
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

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