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Detection of a planetary system orbiting the eclipsing polar HU Aqr
Qian SB(钱声帮)1,2,3; Liu L(刘亮)1,2,3; Liao WP(廖文萍)1,2; Li LJ(李临甲)1,2,3; Zhu LY(朱俐颖)1,2,3; Dai ZB(戴智斌)1,2; He JJ(何家佳)1,2; Zhao EG(赵二刚)1,2; Zhang J(张嘉)1,2,3; Li K(李凯)1,2,3; 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
2011-06
卷号414期号:1页码:L16-L20
DOI10.1111/j.1745-3933.2011.01045.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: Hu Aqr Planetary Systems White Dwarfs
摘要Using the precise times of mid-egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5M(Jup). Their respective distances from the polar are 3.6 and 5.4 au with periods of 6.54 and 11.96 yr, respectively. The observed rate of decrease of period derived from the downward parabolic change in the observed - calculated (O - C) curve is a factor of 15 larger than the value expected for gravitational radiation. This indicates that it may be only a part of a long-period cyclic variation, revealing the presence of one more planet. It is interesting to note that the two detected circumbinary planets follow the Titus-Bode law of solar planets with n = 5 and 6. We estimate that another 10 yr of observations will reveal the presence of the predicted third planet.
项目资助者Chinese Natural Science Foundation [10973037, 10903026, 11003040] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
URL查看原文
归档日期2011-11-28
WOS记录号WOS:000292141600004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAGNETIC BRAKING ; CATACLYSMIC VARIABLES ; WHITE-DWARF ; EVOLUTION ; COMPANION ; AQUARII ; STREAM ; STARS ; FIELD
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5855
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, Yuquan Road 19, Sijingshang Block, 100049 Beijing, China
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Qian SB,Liu L,Liao WP,et al. Detection of a planetary system orbiting the eclipsing polar HU Aqr[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,414(1):L16-L20.
APA Qian SB.,Liu L.,Liao WP.,Li LJ.,Zhu LY.,...&Qian, SB .(2011).Detection of a planetary system orbiting the eclipsing polar HU Aqr.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,414(1),L16-L20.
MLA Qian SB,et al."Detection of a planetary system orbiting the eclipsing polar HU Aqr".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 414.1(2011):L16-L20.
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