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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
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-10-01
Volume16Issue:10Pages:156-163
DOI10.1088/1674-4527/16/10/156
Contribution Rank第1完成单位
Indexed BySCI
KeywordTechniques: Photometric Stars: Binaries: Cataclysmic Variables Stars: Individual: Gsc 4560-02157
Abstract

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.

Funding ProjectN/A
Funding OrganizationN/A
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES,
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
Archive Date2017-06-28
WOS IDWOS:000385996000007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordWHITE-DWARF ; MASS ; QUIESCENCE ; BINARIES ; CATALOG ; STAR
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9744
Collection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
Corresponding AuthorHan ZT(韩忠涛)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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,&Li LJ.(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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