The Value-Added Catalog of ASAS-SN Eclipsing Binaries III: Masses and Radii of Gaia Spectroscopic Binaries

TL;DR

This paper combines photometric and spectroscopic data to accurately determine masses and radii of 122 stars in eclipsing binaries, improving stellar parameter measurements.

Contribution

It integrates ASAS-SN light curves with Gaia spectroscopic orbits, adding 11 new binaries and refining mass and radius estimates with median uncertainties below 8%.

Findings

50% of systems have Gaia periods and eccentricities matching ASAS-SN.

Masses and radii determined with median uncertainties of 7.9% and 6.3%.

Expanded sample of well-characterized eclipsing binaries.

Abstract

Masses and radii of stars can be derived by combining eclipsing binary light curves with spectroscopic orbits. In our previous work, we modeled the All-Sky Automated Survey for Supernovae (ASAS-SN) light curves of more than 30,000 detached eclipsing binaries using PHOEBE. Here we combine our results with 128 double-lined spectroscopic orbits from Gaia Data Release 3. We visually inspect ASAS-SN light curves of double-lined spectroscopic binaries on the lower main sequence and the giant branch, adding 11 binaries to our sample. We find that only 50% of systems have Gaia periods and eccentricities consistent with the ASAS-SN values. We use emcee and PHOEBE to determine masses and radii for a total of 122 stars with median fractional uncertainties of 7.9% and 6.3%, respectively.