Asteroseismic Analysis of $\delta$ Scuti Components of Binary systems: The Case of KIC 8504570

TL;DR

This study conducts a detailed asteroseismic analysis of the $ ext{KIC 8504570}$ binary system, identifying pulsation modes and estimating physical parameters of its $ ext{delta}$ Scuti component to expand understanding of such systems.

Contribution

It provides the first detailed pulsational analysis of the $ ext{KIC 8504570}$ binary, identifying multiple frequencies and modes, and estimating the system's distance using empirical relations.

Findings

Six independent pulsation frequencies identified.

Over 385 combination frequencies detected.

Estimated system distance using pulsation period relation.

Abstract

The present work concerns the Asteroseismology of the Kepler detached eclipsing binary KIC 8504570. Particularly, it focuses on the pulsational behaviour of the oscillating component of this system and the estimation of its physical parameters in order to enrich the so far poor sample of this kind of systems. Using spectroscopic observations, the spectral type of the primary component was determined and used to create accurate light curves models and estimate its absolute parameters. The light curve residuals were subsequently analysed using Fourier transformation techniques to obtain the pulsation models. Theoretical models of $\delta$ Scuti stars were employed to identify the oscillation modes of the six detected independent frequencies of the pulsator. In addition, more than 385 combination frequencies were also detected. The absolute and the pulsational properties of the $\delta$ Scuti star of this system are discussed and compared with all the currently known similar cases. Moreover, using a recent (empirical) luminosity-pulsation period relationship for $\delta$ Scuti stars, the distance of the system was estimated.