A Tale of Two Circularization Periods
arXiv:2112.05868 · doi:10.3847/2041-8213/ac6516
Abstract
We re-analyze the pristine eclipsing binary data from the and TESS missions, focusing on eccentricity measurements at short orbital periods to emperically constrain tidal circularization. We find an average circularization period of 6 days, as well as a short circularization period of 3 days for the /TESS field binaries. We argue previous spectroscopic binary surveys reported longer circularization periods due to small sample sizes, which were contaminated by an abundance of binaries with circular orbits out to 10 days, but we re-affirm their data shows a difference between the eccentricity distributions of young (1 Gyr) and old (3 Gyr) binaries. Our work calls into question the long circularization periods quoted often in the literature.
arXiv commentMain text 9 pages, 13 including appendix, 8 Figures, submitted to ApJL
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