Discovery of a red giant with solar-like oscillations in an eclipsing binary system from Kepler space-based photometry

TL;DR

This paper reports the discovery of a red giant star exhibiting solar-like oscillations within an eclipsing binary system observed by Kepler, providing valuable data on stellar parameters and internal structures.

Contribution

It presents the first detection of a red giant with solar-like oscillations in an eclipsing binary from Kepler data, including initial orbital and stellar parameter estimates.

Findings

Red giant with solar-like oscillations identified in Kepler data

Secondary star is a main-sequence F star in an eccentric orbit

Orbital period longer than 75 days, semi-major axis over 0.5 AU

Abstract

Oscillating stars in binary systems are among the most interesting stellar laboratories, as these can provide information on the stellar parameters and stellar internal structures. Here we present a red giant with solar-like oscillations in an eclipsing binary observed with the NASA Kepler satellite. We compute stellar parameters of the red giant from spectra and the asteroseismic mass and radius from the oscillations. Although only one eclipse has been observed so far, we can already determine that the secondary is a main-sequence F star in an eccentric orbit with a semi-major axis larger than 0.5 AU and orbital period longer than 75 days.