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Cyclic Period Oscillation of the Eclipsing Dwarf Nova DV UMa
Han ZT(韩忠涛)1,2,3; Qian SB(钱声帮)1,2,3; Irina, Voloshina4; Zhu LY(朱俐颖)1,2,3
Source PublicationASTRONOMICAL JOURNAL
2017-05-01
Volume153Issue:5Pages:238-245
DOI10.3847/1538-3881/aa6c2a
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Dwarf Novae Stars: Individual (Dv Uma)
Abstract

DV UMa is an eclipsing dwarf nova with an orbital period of similar to 2.06 hr, which lies just at the bottom edge of the period gap. To detect its orbital period changes, we present 12 new mid-eclipse times by using our CCD photometric data and archival data. The latest version of the O-C diagram, combined with the published mid-eclipse times in quiescence, and spanning similar to 30 years, was obtained and analyzed. The best fit to those available eclipse timings shows that the orbital period of DV UMa is undergoing a cyclic oscillation with a period of 17.58(+/- 0.52) years and an amplitude of 71.1(+/- 6.7) s. The periodic variation most likely arises from the light-travel-time effect via the presence of a circumbinary object, because the required energy to drive the Applegate mechanism is too high in this system. The mass of the unseen companion was derived as M-3 sin i' = 0.025(+/- 0.004) M.. If the third body is in the orbital plane (i.e., i' = i = 82 degrees.9) of the eclipsing pair, this would indicate it is a brown dwarf. This hypothetical brown dwarf is orbiting its host star at a separation of similar to 8.6 au in an eccentric orbit (e. = 0.44).

Funding ProjectChinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11611530685] ; Chinese Natural Science Foundation[11573063] ; Chinese Natural Science Foundation[11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
Funding OrganizationChinese Natural Science Foundation[11325315, 11611530685, 11573063, 11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
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
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
Archive Date2017-06-15
WOS IDWOS:000400895900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBROWN-DWARF ; ORBITAL PERIOD ; CATACLYSMIC VARIABLES ; WHITE-DWARF ; URSAE-MAJORIS ; NN SERPENTIS ; UZ FORNACIS ; PG 0134+070 ; HU AQR ; COMPANION
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10178
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, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, China
3.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, 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,Irina, Voloshina,et al. Cyclic Period Oscillation of the Eclipsing Dwarf Nova DV UMa[J]. ASTRONOMICAL JOURNAL,2017,153(5):238-245.
APA Han ZT,Qian SB,Irina, Voloshina,&Zhu LY.(2017).Cyclic Period Oscillation of the Eclipsing Dwarf Nova DV UMa.ASTRONOMICAL JOURNAL,153(5),238-245.
MLA Han ZT,et al."Cyclic Period Oscillation of the Eclipsing Dwarf Nova DV UMa".ASTRONOMICAL JOURNAL 153.5(2017):238-245.
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