Oscillating red-giant stars in eccentric binary systems

TL;DR

This paper leverages Kepler data to analyze eccentric binary systems with red-giant stars, combining asteroseismology and light curve modeling to characterize stellar and orbital properties, and reports new candidate systems.

Contribution

It introduces a combined asteroseismic and light curve fitting approach to study eccentric binary systems with red giants, including new candidate systems.

Findings

Characterized known eccentric red-giant binary systems.

Identified several new candidate systems hosting oscillating red giants.

Demonstrated the effectiveness of combining asteroseismology with light curve analysis.

Abstract

The unparalleled photometric data obtained by NASA's Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like oscillating red-giant primary component. We also report several new binary systems that are candidates for hosting an oscillating companion. A powerful approach to study binary stars is to combine asteroseimic techniques with light curve fitting. Seismology allows us to deduce the properties of red giants. In addition, by modeling the ellipsoidal modulations we can constrain the parameters of the binary system. An valuable independent source are ground-bases, high-resolution spectrographs.