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GSC 4560-02157: a new long-period eclipsing cataclysmic variable star
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作者 Anton V. Khruslov Anatoly V. Kusakin +3 位作者 Elena A. Barsukova Vitaly E Goranskij Azamat F. Valeev Nikolay N. Samus 《天文和天体物理学研究:英文版》 SCIE CAS CSCD 2015年第7期1005-1011,共7页
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 Astro... 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 = 0.265359d). 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 0.6m) 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, He Ⅰ and He Ⅱ. 展开更多
关键词 激变变星 GSC 亮度变化 CCD测光 天体物理 时间尺度 天文台 望远镜
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