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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; Lajus, EF4,5; Liao WP(廖文萍)1,2,3; Zhang J(张嘉)1,2,3; Han, ZT (reprint author), Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Beijing 100864, Peoples R China.
发表期刊NEW ASTRONOMY
2015-01
卷号34页码:1-5
DOI10.1016/j.newast.2014.04.011
产权排序第1完成单位
收录类别SCI
关键词Stars: Binaries: Eclipsing Stars: Binaries: Dwarf Novae Stars: Individual: Oy Carinae
摘要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.
项目资助者Chinese Natural Science Foundation [11133007, 11325315]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2014-08-27
WOS记录号WOS:000342530900001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SCALE MAGNETIC TOPOLOGIES ; CHROMOSPHERIC ACTIVITY ; CATACLYSMIC VARIABLES ; WHITE-DWARF ; BRAKING ; QUIESCENCE ; STARS ; PHOTOMETRY ; ROTATION ; ECLIPSE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5925
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Han, ZT (reprint author), Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Beijing 100864, Peoples R China.
作者单位1.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
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Han ZT,Qian SB,Lajus, EF,et al. An orbital period analysis of the dwarf novae OY Carinae[J]. NEW ASTRONOMY,2015,34:1-5.
APA Han ZT,Qian SB,Lajus, EF,Liao WP,Zhang J,&Han, ZT .(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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