A comprehensive study of $\delta$ Scuti-type pulsators in eclipsing binaries: oscillating eclipsing Algols
Abstract
Eclipsing double-lined spectroscopic binaries hosting Scuti-type pulsators offer a unique laboratory for simultaneously constraining stellar geometry and interior structure. In this study, we present a comprehensive analysis of five oscillating eclipsing Algol binaries. By combining high-precision, short-cadence TESS photometry with multi-epoch high-resolution spectroscopy, we derive precise stellar and orbital parameters. Frequency power spectra were obtained using residuals from binary modelling. We further investigate the evolutionary history of these systems using a grid of MESA binary evolution simulations. Our analysis suggests that the systems must have undergone either case A or case B mass transfer, with the primary components repositioned in the Hertzsprung-Russell diagram and now pulsating in the Scuti regime, while the cooler secondaries are underluminous and inflated, filling their Roche lobes. This study contributes to the growing catalog of well-characterised oEA systems and our understanding of the effects of mass-transfer on the fate of these short-period binaries.
Cite
@article{arxiv.2502.20626,
title = {A comprehensive study of $\delta$ Scuti-type pulsators in eclipsing binaries: oscillating eclipsing Algols},
author = {T. B. Pawar and A. Miszuda and K. G. Hełminiak and F. Marcadon and A. Moharana and G. Pawar and M. Konacki},
journal= {arXiv preprint arXiv:2502.20626},
year = {2026}
}