2017arXiv (Cornell University)Open access

Modeling Radial Velocities and Eclipse Photometry of the Kepler Target\n KIC 4054905: an Oscillating Red Giant in an Eclipsing Binary

Mansour Benbakoura, P. Gaulme, J. McKeever, P. G. Beck, Jason Jackiewicz, R. A. García

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Abstract

Asteroseismology is a powerful tool to measure the fundamental properties of\nstars and probe their interiors. This is particularly efficient for red giants\nbecause their modes are well detectable and give information on their deep\nlayers. However, the seismic relations used to infer the mass and radius of a\nstar have been calibrated on the Sun. Therefore, it is crucial to assess their\naccuracy for red giants which are not perfectly homologous to it. We study\neclipsing binaries with a giant component to test their validity. We identified\n16 systems for which we intend to compare the dynamical masses and radii\nobtained by combined photometry and spectroscopy to the values obtained from\nasteroseismology. In the present work, we illustrate our approach on a system\nfrom our sample.\n

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Asteroseismology is a powerful tool to measure the fundamental properties of\nstars and probe their interiors. This is particularly efficient for red giants\nbecause their modes are well detectable and give information on their deep\nlayers. However, the seismic relations used to infer the mass and radius of a\nstar have been calibrated on the Sun. Therefore, it is crucial to assess their\naccuracy for red giants which are not perfectly homologous to it. We study\neclipsing binaries with a giant component to test their validity. We identified\n16 systems for which we intend to compare the dynamical masses and radii\nobtained by combined photometry and spectroscopy to the values obtained from\nasteroseismology. In the present work, we illustrate our approach on a system\nfrom our sample.\n

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Available abstract

Asteroseismology is a powerful tool to measure the fundamental properties of\nstars and probe their interiors. This is particularly efficient for red giants\nbecause their modes are well detectable and give information on their deep\nlayers. However, the seismic relations used to infer the mass and radius of a\nstar have been calibrated on the Sun. Therefore, it is crucial to assess their\naccuracy for red giants which are not perfectly homologous to it. We study\neclipsing binaries with a giant component to test their validity. We identified\n16 systems for which we intend to compare the dynamical masses and radii\nobtained by combined photometry and spectroscopy to the values obtained from\nasteroseismology. In the present work, we illustrate our approach on a system\nfrom our sample.\n

Key concepts: Asteroseismology, Photometry (optics), Red giant, Physics, Eclipse, Astrophysics, Stars, Kepler

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