GSC 4560–02157: a new long-period eclipsing cataclysmic variable star. (July 2015)

• Record Type: Journal Article
• Authors: Khruslov, Anton V.; Kusakin, Anatoly V.; Barsukova, Elena A.; Goranskij, Vitaly P.; Valeev, Azamat F.; Samus, Nikolay N.
• Is Part Of: Research in astronomy and astrophysics. Volume 15:Number 7(2015:Jul.)
• Page Start: 1005
• Page End: 1011
• Publication Date: 2015-07
• Subjects: stars: dwarf novae -- binaries: eclipsing -- stars: individual: GSC 4560–02157; Astronomy -- Periodicals; Astrophysics -- Periodicals; 520.5
• DOI: 10.1088/1674-4527/15/7/008
• Languages: English
• ISSNs: 1674-4527

Abstract

Abstract: We study the newly discovered variable star GSC 4560–02157. CCD photometry was performed in 2013–2014 at the Tien Shan Astronomical Observatory, and a spectrum was obtained with the 6-m telescope of the Special Astrophysical Observatory in June, 2014. GSC 4560–02157 is demonstrated to be an eclipsing variable star ( P = 0.265359 d ). All its flat-bottom primary minima are approximately at the same brightness level, but the star's out-of-eclipse brightness and brightness at secondary minima vary considerably (by up to 0.6 m ) from cycle to cycle. Moreover, there are short-term (time scale of 0.03–0.04 days) small-amplitude brightness variations out of eclipse. This behavior suggests a cataclysmic nature for the star, which is confirmed with a spectrum taken on 2014 June 5. The spectrum shows numerous emissions of the hydrogen Balmer series, HeI and HeII.