Hunt for extremely eccentric eclipsing binaries

Abstract

We report the very first analysis of 27 eclipsing binary systems with high eccentricities that sometimes reach up to 0.8. The orbital periods for these systems range from 1.4 to 37 days, and the median of the sample is 10.3 days. Star CzeV3392 (= UCAC4 623 022784), for example, currently is the eclipsing system with the highest eccentricity (e = 0.22) of stars with a period shorter than 1.5 days. We analysed the light curves of all 27 systems and obtained the physical parameters of both components, such as relative radii, inclinations, or relative luminosities. The most important parameters appear to be the derived periods and eccentricities. They allow constructing the period-eccentricity diagram. This eccentricity distribution is used to study the tidal circularisation theories. Many systems have detected third-light contributions, which means that the Kozai-Lidov cycles might also be responsible for the high eccentricities in some of the binaries.

6 pages, 3 figures, 2 tables, published in: A&A 652, A81 (2021)

References in corpus (24)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Transiting Exoplanet Survey Satellite
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Accurate masses and radii of normal stars: modern results and applications
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• SB9: The Ninth Catalogue of Spectroscopic Binary Orbits
• Dynamical Origin of Extrasolar Planet Eccentricity Distribution
• The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
• The Second-Generation Guide Star Catalog: Description and Properties
• The Magellanic Clouds Photometric Survey: The Large Magellanic Cloud Stellar Catalog and Extinction Map
• A UBVR CCD Survey of the Magellanic Clouds
• A Robust Measure of Tidal Circularization in Coeval Binary Populations: The solar-type spectroscopic Binary Population in The Open Cluster M35
• Comparative statistics and origin of triple and quadruple stars
• Observational Evidence for Tidal Interaction in Close Binary Systems
• A Catalogue of OB Stars from LAMOST Spectroscopic Survey
• Machine Learning Regression of stellar effective temperatures in the second $Gaia$ Data Release
• Orbital Circularization of Hot and Cool Kepler Eclipsing Binaries
• Light curve solutions for bright detached eclipsing binaries in SMC: absolute dimensions and distance indicators
• Spectroscopic and seismic analysis of red giants in eclipsing binaries discovered by Kepler
• The Highly-Eccentric Detached Eclipsing Binaries in ACVS and MACC
• Visual Orbits of Spectroscopic Binaries with the CHARA Array. II. The eclipsing binary HD 185912

Cited by in corpus (3)

• The Value-Added Catalog of ASAS-SN Eclipsing Binaries: Parameters of Thirty Thousand Detached Systems
• The Value-Added Catalog of ASAS-SN Eclipsing Binaries II: Properties of Extra-Physics Systems
• A 2+1+1 quadruple star system containing the most eccentric, low-mass, short-period, eclipsing binary known