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An orbital period analysis of the dwarf novae OY Carinae
Han ZT(韩忠涛)1,2,3; Qian SB(钱声帮)1,2,3; Fernandez Lajus, E.4,5; Liao WP(廖文萍)1,2,3; Zhang J(张嘉)1,2,3
Source PublicationNEW ASTRONOMY
2015-01
Volume34Pages:1-5
DOI10.1016/j.newast.2014.04.011
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Eclipsing Stars: Binaries: Dwarf Novae Stars: Individual: Oy Carinae
Abstract

By using our twelve new CCD times of light minimum of OY Carinae COY Car) together with those collected from the literature, it is found that the O-C curve of OY Car shows a downward parabola with an amplitude of 27.8 s and a cyclic change of a period 14.0 yr. The period decrease is opposite to the hypothesis of mass transfer, and it cannot be explained by angular momentum loss via gravitational radiation. The Rappaport et al. (1983)'s magnetic braking (MB) prescription is adopted to explain the observed orbital period decrease. The cyclic change of period is analyzed with the light travel-time effect that originates from gravitational influence of a third body. The mass of the third star is determined to be M(3)sini' = 0.008097(+/- 0.000014) M-circle dot = 8.48(+/- 0.02) M-Jup, suggesting that it may be a critical substellar object between brown dwarf and giant planet. If the orbital inclination of the third body equals 90 degrees, the distance between the third body and the mass centre of the whole system is about 6.18(+/- 0.45) AU. (C) 2014 Elsevier B.V. All rights reserved.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315]
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
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2014-08-27
WOS IDWOS:000342530900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSCALE MAGNETIC TOPOLOGIES ; CHROMOSPHERIC ACTIVITY ; CATACLYSMIC VARIABLES ; WHITE-DWARF ; BRAKING ; QUIESCENCE ; STARS ; PHOTOMETRY ; ROTATION ; ECLIPSE
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5925
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, P. O. Box 110, 650011 Kunming, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PR China
3.Graduate School of the Chinese Academy of Sciences, Yuquan Road 19#, SijingShan Block, 100049 Beijing City, PR China
4.Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires, Argentina
5.Instituto de Astrofisica de La Plata (CCT La plata - CONICET/UNLP), Argentina
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,Fernandez Lajus, E.,et al. An orbital period analysis of the dwarf novae OY Carinae[J]. NEW ASTRONOMY,2015,34:1-5.
APA Han ZT,Qian SB,Fernandez Lajus, E.,Liao WP,&Zhang J.(2015).An orbital period analysis of the dwarf novae OY Carinae.NEW ASTRONOMY,34,1-5.
MLA Han ZT,et al."An orbital period analysis of the dwarf novae OY Carinae".NEW ASTRONOMY 34(2015):1-5.
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