Detection of a planetary system orbiting the eclipsing polar HU Aqr

	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
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2011-06
卷号	414 期号:1 页码:L16-L20
关键词	binaries: close binaries: eclipsing stars: individual: HU Aqr planetary systems white dwarfs
ISSN号	0035-8711
通讯作者	Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MAGNETIC BRAKING ; CATACLYSMIC VARIABLES ; WHITE-DWARF ; EVOLUTION ; COMPANION ; AQUARII ; STREAM ; STARS ; FIELD
收录类别	SCI
原文出处	http://mnrasl.oxfordjournals.org/content/414/1/L16
语种	英语
WOS记录号	WOS:000292141600004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5855]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
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
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.,...&Li K.(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.