Discovery of pulsating components in eclipsing binary systems through the TESS light curves: The cases of CPD-30 740, HD 97329, V1637 Ori and TYC 683-640-1

TL;DR

This study identifies pulsating primary stars in four eclipsing binary systems using TESS light curves, revealing new pulsational behaviors and classifying the systems' types and pulsation characteristics.

Contribution

First evidence of pulsations in primary components of four eclipsing binaries analyzed through TESS data, including classification and pulsational analysis.

Findings

CPD-30 740 and V1637 Ori are oscillating Algol-type binaries.

HD 97329 and TYC 683-640-1 are detached pulsating systems.

Primary components are confirmed as pulsating stars.

Abstract

We present the first evidence for the pulsations of primary components of four eclipsing binary systems. The TESS light curves of the targets are analyzed, the light and the absolute parameters are derived. Fourier analyses are applied to the residual data subtracted from the binary models to reveal the pulsational characteristics of the primaries. The components of the systems are compared to well-known binary systems of the same morphological type. The types of pulsational classes for the primaries are also discussed. Results show that CPD-30 740 and V1637 Ori are oscillating eclipsing Algol type binary stars, while HD 97329 and TYC 683-640-1 are found to be detached systems with pulsating primary components. We conclude that the primary components of the systems are pulsating stars.