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arXiv · 2509.18277

Selected $\beta$ Cephei pulsators in eclipsing binaries

O. Cakirli·B. Hoyman·O. Ozdarcan·S. Bilir
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Abstract

We present a comprehensive analysis of five eclipsing binary systems containing $\beta$ Cephei-type pulsating components. These systems were identified using the high-precision Transiting Exoplanet Survey Satellite (TESS) photometry and complemented by high-resolution spectroscopic data from multiple instruments (e.g., HARPS, FEROS, UVES). For each target, we derived fundamental parameters including masses, radii, effective temperatures, and metallicities through a combined analysis of light curves and radial velocity data. The atmospheric parameters were determined via spectral disentangling and MCMC-based fitting techniques. Absolute parameters were used to position components on the HR diagram, and evolutionary status was assessed using MESA/MIST stellar tracks. Frequency analysis revealed multiple significant pulsation modes in all systems. Our study increases the number of well-characterized $\beta$ Cephei pulsators in binaries and provides high-precision benchmarks for stellar evolution and asteroseismology.

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O. Cakirli, B. Hoyman, O. Ozdarcan, S. Bilir. 2025-09-22. Selected $\beta$ Cephei pulsators in eclipsing binaries. https://arxiv.org/abs/2509.18277

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