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DETECTION OF A GIANT EXTRASOLAR PLANET ORBITING THE ECLIPSING POLAR DP LEO
Qian SB(钱声帮)1,2,3; Liao WP(廖文萍)1,2,3; Zhu LY(朱俐颖)1,2,3; Dai ZB(戴智斌)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ASTROPHYSICAL JOURNAL LETTERS
2010
卷号708期号:1页码:L66-L68
DOI10.1088/2041-8205/708/1/L66
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Planetary Systems Novae Stars: Individual (Dp Leo) Cataclysmic Variables
摘要DP Leo is the first discovered eclipsing polar with a short period of 1.4967 hours. The period variation of the eclipsing binary was analyzed by using five new determined eclipse times together with those compiled from the literature. It is discovered that the O - C curve of DP Leo shows a cyclic variation with a period of 23.8 years and a semiamplitude of 31.5 s. The small-amplitude periodic change can be plausibly explained as the light-travel time effect due to the presence of a tertiary companion. The mass of the tertiary component is determined to be M(3) sin i' = 0.00600(+/- 0.00055) M(circle dot) = 6.28(+/- 0.58) M(Jupiter) when a total mass of 0.69 M(circle dot) is adopted. If the tertiary companion is coplanar to the eclipsing binary (i.e., i' = 79 degrees.5), it should be a giant extrasolar planet with a mass of 6.39 M(Jupiter) at a distance of 8.6 astronomical units to the central binary. One of the most interesting things that we have learned about extrasolar planets over the last 17 years is that they can exist almost anywhere. The detection of a giant planet orbiting a polar would provide insight into the formation and evolution of circumbinary planets (planets orbiting both components of short-period binaries) as well as the late evolution of binary stars.
项目资助者Chinese Natural Science Foundation [10973037, 10903026, 10778718] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157] ; Special Foundation of the President ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN2041-8205
URL查看原文
归档日期2010-01-26
WOS记录号WOS:000273306700015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WHITE-DWARF STARS ; MAGNETIC BRAKING ; BROWN DWARF ; DODO SURVEY ; NN-SER ; COMPANION ; SYSTEM ; SUBSTELLAR ; ROTATION ; BINARIES
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5843
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, P.O. Box 110, 650011 Kunming, China
2.Graduate University of the Chinese Academy of Sciences, 100049 Beijing, China
3.Laboratory of the Structure and Evolution of Celestial Bodies, Chinese Academy of Sciences, P.O. Box 110, 650011, Kunming, China
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Qian SB,Liao WP,Zhu LY,et al. DETECTION OF A GIANT EXTRASOLAR PLANET ORBITING THE ECLIPSING POLAR DP LEO[J]. ASTROPHYSICAL JOURNAL LETTERS,2010,708(1):L66-L68.
APA Qian SB,Liao WP,Zhu LY,Dai ZB,&Qian, SB .(2010).DETECTION OF A GIANT EXTRASOLAR PLANET ORBITING THE ECLIPSING POLAR DP LEO.ASTROPHYSICAL JOURNAL LETTERS,708(1),L66-L68.
MLA Qian SB,et al."DETECTION OF A GIANT EXTRASOLAR PLANET ORBITING THE ECLIPSING POLAR DP LEO".ASTROPHYSICAL JOURNAL LETTERS 708.1(2010):L66-L68.
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