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 |
DOI | 10.1111/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 |
ISSN | 0035-8711 |
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 |
引用统计 | |
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 |
第一作者单位 | 中国科学院云南天文台 |
推荐引用方式 GB/T 7714 | 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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