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Physical parameters and orbital period variation of a newly discovered cataclysmic variable GSC 4560-02157
Han ZT(韩忠涛)1,2,3; Qian SB(钱声帮)1,2,3; Voloshina, Irma4; Metlov, Vladimir G.4; Zhu LY(朱俐颖)1,2,3; Li LJ(李临甲)1,2; Han, ZT
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-10-01
卷号16期号:10页码:156-163
DOI10.1088/1674-4527/16/10/156
产权排序第1完成单位
收录类别SCI
关键词Techniques: Photometric Stars: Binaries: Cataclysmic Variables Stars: Individual: Gsc 4560-02157
摘要GSC 4560-02157 is a new eclipsing cataclysmic variable with an orbital period of 0.265359 days. By using the published V- and R-band data together with our observations, we discovered that the O - C curve of GSC 4560-02157 may show a cyclic variation with a period of 3.51 years and an amplitude of 1.40 min. If this variation is caused by a light travel-time effect via the existence of a third body, then its mass can be derived as M-3 sin i' approximate to 1.08 M-Jup, and it should be a low-mass star. In addition, several physical parameters were measured. The color of the secondary star was determined to be V - R = 0.77(+/- 0.03) which corresponds to a spectral type of K2-3. The secondary star's mass was estimated as M-2 = 0.73(+/- 0.02) M-circle dot by combing the derived V - R value around phase 0 with the assumption that it obeys the mass-luminosity relation for main sequence stars. This mass is consistent with the mass period relation for CV donor stars. For the white dwarf, the eclipse durations and contacts of the white dwarf yield an upper limit on the white dwarf's radius corresponding to a lower limit on mass of M-1 approximate to 0.501 M-circle dot. The overestimated radius and previously published spectral data indicate that the boundary layer may have a very high temperature.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
归档日期2017-06-28
WOS记录号WOS:000385996000007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WHITE-DWARF ; MASS ; QUIESCENCE ; BINARIES ; CATALOG ; STAR
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9744
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Han, ZT
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Sternberg Astronomical Institute, Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia
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Han ZT,Qian SB,Voloshina, Irma,et al. Physical parameters and orbital period variation of a newly discovered cataclysmic variable GSC 4560-02157[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(10):156-163.
APA Han ZT.,Qian SB.,Voloshina, Irma.,Metlov, Vladimir G..,Zhu LY.,...&Han, ZT.(2016).Physical parameters and orbital period variation of a newly discovered cataclysmic variable GSC 4560-02157.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(10),156-163.
MLA Han ZT,et al."Physical parameters and orbital period variation of a newly discovered cataclysmic variable GSC 4560-02157".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.10(2016):156-163.
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