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arXiv · 2502.20626

A comprehensive study of $\delta$ Scuti-type pulsators in eclipsing binaries: oscillating eclipsing Algols

T. B. Pawar·A. Miszuda·K. G. Hełminiak·F. Marcadon·A. Moharana·G. Pawar·M. Konacki
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Abstract

Eclipsing double-lined spectroscopic binaries hosting $\delta$ 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 $\delta$ 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.

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T. B. Pawar, A. Miszuda, K. G. Hełminiak, F. Marcadon, A. Moharana, G. Pawar, M. Konacki. 2025-02-28. A comprehensive study of $\delta$ Scuti-type pulsators in eclipsing binaries: oscillating eclipsing Algols. https://doi.org/10.1051/0004-6361%2F202554310

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