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DE CVn: An Eclipsing Post-common Envelope Binary with a Circumbinary Disk and a Giant Planet
Han ZT(韩忠涛)1,2,3,4; Qian SB(钱声帮)1,2,3,4,5; Zhu LY(朱俐颖)1,3,4,5; Zhi, Q. -J.2; Dong, A. -J.2; Soonthornthum, B.6; Poshyachinda, S.6; Sarotsakulchai, T.1,4,6; Fang XH(方小慧)1,3,5; Wang QS(王琪善)1,3,5; Voloshina, Irina7
Source PublicationASTROPHYSICAL JOURNAL
2018-11-20
Volume868Issue:1Pages:8
DOI10.3847/1538-4357/aae64d
Contribution Rank第1完成单位
Indexed BySCI
Keywordbinaries: close binaries: eclipsing stars: evolution stars: individual (DE CVn)
Abstract

We present a timing analysis of the eclipsing post-common envelope binary (PCEB) DE CVn. Based on new CCD photometric observations and published data, we found that the orbital period in DE CVn has a cyclic period oscillation with an amplitude of 28.08 s and a period of 11.22 years plus a rapid period decrease at a rate of <(P)over dot> = -3.35 x 10(-1)(1)ss(-1). According to the evolutionary theory, secular period decreases in PCEBs arise from angular momentum losses (AMLs) driven by gravitational radiation (GR) and magnetic braking (MB). However, the observed orbital decay is too fast to be produced by AMLs via GR and MB, indicating that there could be another AML mechanism. We suggest that a circumbinary disk around DE CVn may be responsible for the additional AML. The disk mass was derived as a few x10(-4)-10(-3) M-circle dot, which is in agreement with that inferred from previous studies in the order of magnitude. The cyclic change is most likely the result of the gravitational perturbation by a circumbinary object due to the Applegate's mechanism failing to explain such a large period oscillation. The mass of the potential third body is calculated as M-3 sin i' = 0.011(+/- 0.003) M-circle dot. Supposing the circumbinary companion and the eclipsing binary are coplanar, its mass would correspond to a giant planet. This hypothetical giant planet is moving in a circular orbit of a radius of similar to 5.75(+/- 2.02) au around its host star.

Funding ProjectNational Natural Science Foundation of China[11573063] ; National Natural Science Foundation of China[11611530685] ; National Natural Science Foundation of China[11803083] ; National Natural Science Foundation of China[U1731238] ; National Natural Science Foundation of China[U1831120] ; Key Science Foundation of Yunnan Province[2017FA001] ; Open Project Program of Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing[KF201807] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China[11573063, 11611530685, 11803083, U1731238, U1831120] ; Key Science Foundation of Yunnan Province[2017FA001] ; Open Project Program of Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing[KF201807] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000450618900009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordX-RAY BINARIES ; MAGNETIC BRAKING ; NN SERPENTIS ; BROWN-DWARF ; CATACLYSMIC VARIABLES ; HS 0705+6700 ; WZ SAGITTAE ; UZ FORNACIS ; HU AQR ; SYSTEM
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18415
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 (CAS), P. O. Box 110, 650216 Kunming, People's Republic of China
2.Guizhou Provincial Key Laboratory of Radio Data Processing, School of Physics and Electronic Sciences, Guizhou Normal University, Guiyang 550001, People's Republic of China
3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. O. Box 110, 650216 Kunming, People's Republic of China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
5.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, People's Republic of China
6.National Astronomical Research Institute of Thailand, Ministry of Science and Technology, Bangkok, Thailand
7.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,Zhu LY,et al. DE CVn: An Eclipsing Post-common Envelope Binary with a Circumbinary Disk and a Giant Planet[J]. ASTROPHYSICAL JOURNAL,2018,868(1):8.
APA Han ZT.,Qian SB.,Zhu LY.,Zhi, Q. -J..,Dong, A. -J..,...&Voloshina, Irina.(2018).DE CVn: An Eclipsing Post-common Envelope Binary with a Circumbinary Disk and a Giant Planet.ASTROPHYSICAL JOURNAL,868(1),8.
MLA Han ZT,et al."DE CVn: An Eclipsing Post-common Envelope Binary with a Circumbinary Disk and a Giant Planet".ASTROPHYSICAL JOURNAL 868.1(2018):8.
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