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Creators/Authors contains: "Callahan, Jowen"

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  1. Heartbeat stars are a subclass of binary stars with short periods, high eccentricities, and phase-folded light curves that resemble an electrocardiogram. We start from the πΊπ‘Žπ‘–π‘Ž catalogs of spectroscopic binaries and use 𝑇𝐸𝑆𝑆 photometry to identify 112 new heartbeat star systems. We fit their phase-folded light curves with an analytic model to measure their orbital periods, eccentricities, inclinations, and arguments of periastron. We then compare these orbital parameters to the πΊπ‘Žπ‘–π‘Ž spectroscopic orbital solution. Our periods and eccentricities are consistent with the πΊπ‘Žπ‘–π‘Ž solutions for 85 % of the single-line spectroscopic binaries but only 20 % of the double-line spectroscopic binaries. For the two double-line spectroscopic binary heartbeat stars with consistent orbits, we combine the 𝑇𝐸𝑆𝑆 phase-folded light curve and the πΊπ‘Žπ‘–π‘Ž velocity semi-amplitudes to measure the stellar masses and radii with 𝙿𝙷𝙾𝙴𝙱𝙴 . In a statistical analysis of the HB population, we find that non-giant heartbeat stars have evolved off the main sequence and that their fractional abundance rises rapidly with effective temperature. 
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    Free, publicly-accessible full text available January 1, 2026