YNAO OpenIR  > 双星与变星研究组
LONG-TERM DECREASE AND CYCLIC VARIATION IN THE ORBITAL PERIOD OF THE ECLIPSING DWARF NOVA V2051 OPH
Qian SB(钱声帮)1,2,3; Han ZT(韩忠涛)1,2,3; Fernandez Lajus, E.4,5; Zhu LY(朱俐颖)1,2,3; Li LJ(李临甲)1,2; Liao WP(廖文萍)1,2; Zhao EG(赵二刚)1,2,3
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2015-11
Volume221Issue:1
DOI10.1088/0067-0049/221/1/17
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Eclipsing Planetary System Stars: Dwarf Nova Stars: Evolution Stars: Individuals (V2051 Oph)
Abstract

V2051 Oph is a deeply eclipsing dwarf nova with an orbital period below the period gap of cataclysmic variables (CVs). It has been photometrically monitored since 2008 June and 24 mid-eclipse times of the white dwarf have been obtained. The changes in the orbital period are investigated using all of the available mid-eclipse times. A continuous period decrease with a rate of P = -5.93 x 10(-10) days yr(-1) was discovered to be superimposed on a periodic variation with a small amplitude of 0 000329 and a period of 21.64 years. The standard theory predicted that the evolution of CVs below the period gap is driven by gravitational radiation. However, angular momentum loss (AML) via gravitational radiation is insufficient to explain this decrease, and additional AML via magnetic braking that is about five times the gravitational radiation rate is required. This is consistent with the theoretical requirement indicating that magnetic braking of the fully convective star is not completely stopped. The cyclic oscillation was interpreted as the variation of the arriving eclipse time via the presence of a third body because the required energy for the Applegate mechanism is much larger than that radiated from the secondary in 10 years. Its mass is derived as M-3 sin i' = 7.3(+/- 0.7) Jupiter mass. For orbital inclinations i' >= 30 degrees.3, it would be a planetary object. The giant circumbinary planet is orbiting around V2051 Oph at an orbital separation of about 9.0 astronomical units (AU) in an eccentric orbit (e' = 0.37). These conclusions support the ideas that some planets could survive stellar late evolution and that dwarf novae are also planetary hosting stars.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Key Research Program of the Chinese Academy of Sciences[KGZD-EW-603] ; Science Foundation of Yunnan Province[2012HC011] ; Science Foundation of Yunnan Province[2013FB084] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010202]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315] ; Key Research Program of the Chinese Academy of Sciences[KGZD-EW-603] ; Science Foundation of Yunnan Province[2012HC011, 2013FB084] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010202]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0067-0049
URL查看原文
Archive Date2015-11-06 ; 2016-04-12
WOS IDWOS:000366620600017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLOW-MASS STARS ; BINARY HS 0705+6700 ; CATACLYSMIC VARIABLES ; WHITE-DWARFS ; BROWN DWARFS ; ACCRETION-DISK ; CIRCUMBINARY PLANETS ; SUBSTELLAR OBJECTS ; STELLAR EVOLUTION ; MAGNETIC BRAKING
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9390
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 AuthorQian SB(钱声帮)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, P. R. China
2.Key laboratory of the structure and evolution of celestial objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P. R. China
4.Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Pcia. Bs. As., Argentina
5.Instituto de Astrofísica de La Plata (CCT La plata—CONICET/UNLP), Argentina
6.Visiting Astronomer, Complejo Astronómico El Leoncito operated under agreement between the Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina and the National Universities of La Plata, Córdoba and San Juan.
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Han ZT,Fernandez Lajus, E.,et al. LONG-TERM DECREASE AND CYCLIC VARIATION IN THE ORBITAL PERIOD OF THE ECLIPSING DWARF NOVA V2051 OPH[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2015,221(1).
APA Qian SB.,Han ZT.,Fernandez Lajus, E..,Zhu LY.,Li LJ.,...&Zhao EG.(2015).LONG-TERM DECREASE AND CYCLIC VARIATION IN THE ORBITAL PERIOD OF THE ECLIPSING DWARF NOVA V2051 OPH.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,221(1).
MLA Qian SB,et al."LONG-TERM DECREASE AND CYCLIC VARIATION IN THE ORBITAL PERIOD OF THE ECLIPSING DWARF NOVA V2051 OPH".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 221.1(2015).
Files in This Item:
File Name/Size DocType Version Access License
LONG-TERM DECREASE A(529KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qian SB(钱声帮)]'s Articles
[Han ZT(韩忠涛)]'s Articles
[Fernandez Lajus, E.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qian SB(钱声帮)]'s Articles
[Han ZT(韩忠涛)]'s Articles
[Fernandez Lajus, E.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qian SB(钱声帮)]'s Articles
[Han ZT(韩忠涛)]'s Articles
[Fernandez Lajus, E.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: LONG-TERM DECREASE AND CYCLIC VARIATION IN THE ORBITAL PERIOD OF THE ECLIPSING DWARF NOVA V2051 OPH.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.