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Eclipsing binary stars with a delta Scuti component

Smalley

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Abstract

Eclipsing binaries with a d Sct component are powerful tools to derive the fundamental parameters and probe the internal structure of stars. In this study, spectral analysis of six primary d Sct components in eclipsing binaries has been performed. Values of Teff, v?sin?i, and metallicity for the stars have been derived from medium-resolution spectroscopy. Additionally, a revised list of d Sct stars in eclipsing binaries is presented. In this list, we have only given the d Sct stars in eclipsing binaries to show the effects of the secondary components and tidal-locking on the pulsations of primary d Sct components. The stellar pulsation, atmospheric and fundamental parameters (e.g. mass, radius) of 92 d Sct stars in eclipsing binaries have been gathered. Comparison of the properties of single and eclipsing binary member d Sct stars has been made. We find that single d Sct stars pulsate in longer periods and with higher amplitudes than the primary d Sct components in eclipsing binaries. The v?sin?i of d Sct components is found to be significantly lower than that of single d Sct stars. Relationships between the pulsation periods, amplitudes and stellar parameters in our list have been examined. Significant correlations between the pulsation periods and the orbital periods, Teff, log?g, radius, mass ratio, v?sin?i and the filling factor have been found.

Acceptance Date May 18, 2017
Publication Date Sep 1, 2017
Publicly Available Date Mar 29, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Pages 915 -931
DOI https://doi.org/10.1093/mnras/stx1241
Keywords stars, atmospheres, binaries, eclipsing, fundamental parameters, oscillations, variables, d Scuti
Publisher URL http://dx.doi.org/0.1093/mnras/stx1241

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