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A possible giant planet orbiting the cataclysmic variable LX Ser
Li, Kai1,2; Hu, Shaoming1; Zhou, Jilin3; Wu, Donghong3; Guo, Difu1; Jiang, Yunguo1; Gao, Dongyang1; Chen, Xu1; Wang, Xianyu1
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017-04-01
Volume69Issue:2
DOI10.1093/pasj/psw134
Indexed BySCI
Keywordbinaries: eclipsing novae, cataclysmic variables stars: individual (LX Ser)
Abstract

LX Ser is a deeply eclipsing cataclysmic variable with an orbital period of 0.1584325 d. 62 new eclipse times were determined by our observations and the AAVSO International Data base. Combining all available eclipse times, we analyzed the O-C behavior of LX Ser. We found that the O-C diagram of LXSer shows a sinusoidal oscillation with a period of 22.8 yr and an amplitude of 0.00035 d. Two mechanisms (i.e., the Applegate mechanism and the light-travel time effect) are applied to explain the cyclic modulation. We found that it is difficult to apply the Applegate mechanism to explain the cyclic oscillation in the orbital period. Therefore, the cyclic period change is most likely to be caused by the light-travel time effect due to the presence of a third body. The mass of the tertiary component was determined to be M-3 similar to 7.5M(Jup). We supposed that the tertiary companion is plausibly a giant planet. The stability of the giant planet was checked, and we found that the multiple system is stable.

Funding ProjectNational Natural Science Foundation of China[U1431105] ; National Natural Science Foundation of China[11333002] ; Chinese Academy of Sciences[U1431105] ; Natural Science Foundation of Shandong Province[ZR2014AQ019] ; Young Scholars Program of Shandong University, Weihai[2016WHWLJH07] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201303]
Funding OrganizationNational Natural Science Foundation of China[U1431105, 11333002] ; Chinese Academy of Sciences[U1431105] ; Natural Science Foundation of Shandong Province[ZR2014AQ019] ; Young Scholars Program of Shandong University, Weihai[2016WHWLJH07] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201303]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
WOS IDWOS:000401118500014
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSTEPANYANS STAR ; CLOSE BINARIES ; PERIOD CHANGES ; NN-SER ; RS CVN ; DWARF ; EVOLUTION ; PHOTOMETRY ; COMPANION ; HERCULIS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10066
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLi, Kai
Affiliation1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.School of Astronomy and Space Science and Key Laboratory ofModern Astronomy and Astrophysics in Ministry of Education, Nanjing University, Nanjing 210093, China
Recommended Citation
GB/T 7714
Li, Kai,Hu, Shaoming,Zhou, Jilin,et al. A possible giant planet orbiting the cataclysmic variable LX Ser[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(2).
APA Li, Kai.,Hu, Shaoming.,Zhou, Jilin.,Wu, Donghong.,Guo, Difu.,...&Wang, Xianyu.(2017).A possible giant planet orbiting the cataclysmic variable LX Ser.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,69(2).
MLA Li, Kai,et al."A possible giant planet orbiting the cataclysmic variable LX Ser".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69.2(2017).
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