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A circumbinary planet in orbit around the short-period white dwarf eclipsing binary RR Cae
Qian SB(钱声帮)1,2,3; Liu L(刘亮)1,2,3; Zhu LY(朱俐颖)1,2; Dai ZB(戴智斌)1,2; Lajus, EF4,5; Baume, GL4,5; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2012-05
卷号422期号:1页码:L24-L27
DOI10.1111/j.1745-3933.2012.01228.x
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual: Rr Cae Planetary Systems White Dwarfs
摘要By using six newly determined mid-eclipse times together with those collected from the literature, we have found that the observed minus calculated (O-C) curve of RR Cae shows a cyclic change with a period of 11.9 yr and an amplitude of 14.3 s while it undergoes an upward parabolic variation [revealing a long-term period increase at a rate of. P = +4.18(+/- 0.20) x 10(-12)]. The cyclic change was analysed for the light-travel-time effect that arises from the gravitational influence of a third companion. The mass of the third body was determined to be M(3)sin i' = 4.2(+/- 0.4) M-Jup, suggesting that it is a circumbinary giant planet when its orbital inclination is larger than 17.degrees 6. The orbital separation of the circumbinary planet from the central eclipsing binary is about 5.3(+/- 0.6) au. The period increase is opposite to the changes caused by angular momentum loss via magnetic braking or/and gravitational radiation; and it cannot be explained by the mass transfer between both components because of its detached configuration. These indicate that the observed upward parabolic change is only a part of a long-period (longer than 26.3 yr) cyclic variation, which may reveal the presence of another giant circumbinary planet in a wide orbit.
项目资助者Chinese Natural Science Foundation [11133007, 10973037, 10903026, 11003040] ; West Light Foundation of Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
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归档日期2012-06-29
WOS记录号WOS:000303912600006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]NN-SER ; COMPANION ; SPECTROSCOPY ; STAR ; VIR
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5868
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Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, China
3.Graduate University of the Chinese Academy of Sciences, 19A Yuquanlu, Sijingshang Block, 100049 Beijing, 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), Paseo del Bosque s/n, La Plata, BA, B1900FWA, Argentina
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Qian SB,Liu L,Zhu LY,et al. A circumbinary planet in orbit around the short-period white dwarf eclipsing binary RR Cae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,422(1):L24-L27.
APA Qian SB.,Liu L.,Zhu LY.,Dai ZB.,Lajus, EF.,...&Qian, SB .(2012).A circumbinary planet in orbit around the short-period white dwarf eclipsing binary RR Cae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,422(1),L24-L27.
MLA Qian SB,et al."A circumbinary planet in orbit around the short-period white dwarf eclipsing binary RR Cae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 422.1(2012):L24-L27.
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