CAOSP abstracts, Volume: 50, No.: 2, year: 2020

Author(s): Zhou, X.; Soonthornthum, B.; Qian, S.-B.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 50, no. 2, p. 611-614.
Date: 3/2020
Title: Photometric observations of an extreme mass ratio overcontact binary
Keyword(s): binaries: eclipsing, binaries: photometry, light curves, stellar mergers
Pages: 611 -- 614
DOI: https://doi.org/10.31577/caosp.2020.50.2.611
NASA ADS Abstract Service: 2020CoSka..50..611Z
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: Our R_C and I_C light curves of CSS J135012.1+272259 were analyzed with the Wilson-Devinney (W-D) program. The results reveal that CSS J135012.1+272259 is an extreme mass ratio overcontact binary with mass ratio q = 0.147. It may be in the final evolutionary stage of cool short-period binaries and merge into a single rapid-rotation star to form a blue straggler or FK Com type star. Also, 25 extreme mass ratio overcontact binary systems (q ≤ 0.15) are collected for long-term monitoring. These targets will improve understanding of the pre-outburst state of overcontact binaries and enrich knowledge of the merger mechanism.