OGLE-2011-BLG-0265Lb: A JOVIAN MICROLENSING PLANET ORBITING AN M DWARF

	OGLE-2011-BLG-0265Lb: A JOVIAN MICROLENSING PLANET ORBITING AN M DWARF
	Skowron, J; Shin, IG; Udalski, A; Han, C; Sumi, T; Shvartzvald, Y; Gould, A; Prester, DD; Street, RA; Jorgensen, UG
刊名	ASTROPHYSICAL JOURNAL
	2015-05-01
卷号	804 期号:1
关键词	gravitational lensing: micro planetary systems
ISSN号	0004-637X
通讯作者	Tregloan-Reed, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
产权排序	第五十四完成单位
英文摘要	We report the discovery of a Jupiter-mass planet orbiting an M-dwarf star that gave rise to the microlensing event OGLE-2011-BLG-0265. Such a system is very rare among known planetary systems and thus the discovery is important for theoretical studies of planetary formation and evolution. High-cadence temporal coverage of the planetary signal, combined with extended observations throughout the event, allows us to accurately model the observed light curve. However, the final microlensing solution remains degenerate, yielding two possible configurations of the planet and the host star. In the case of the preferred solution, the mass of the planet is M-p = 0.9 +/- 0.3 M-J, and the planet is orbiting a star with a mass M = 0.22 +/- 0.06 M-circle dot. The second possible configuration (2 sigma away) consists of a planet with M-p = 0.6 +/- 0.3M(J) and host star with M = 0.14 +/- 0.06M(circle dot). The system is located in the Galactic disk 3-4 kpc toward the Galactic bulge. In both cases, with an orbit size of 1.5-2.0 AU, the planet is a "cold Jupiter"-located well beyond the "snow line" of the host star. Currently available data make the secure selection of the correct solution difficult, but there are prospects for lifting the degeneracy with additional follow-up observations in the future, when the lens and source star separate.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SURFACE BRIGHTNESS RELATIONS ; GRAVITATIONAL BINARY-LENS ; GALACTIC BULGE ; MASS PLANET ; OGLE-III ; JUPITER/SATURN ANALOG ; ANGULAR SIZES ; GIANT PLANETS ; SNOW LINE ; STARS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/804/1/33/meta
语种	英语
WOS记录号	WOS:000354189500033
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6810]
专题	云南天文台_系外行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
推荐引用方式 GB/T 7714	Skowron, J,Shin, IG,Udalski, A,et al. OGLE-2011-BLG-0265Lb: A JOVIAN MICROLENSING PLANET ORBITING AN M DWARF[J]. ASTROPHYSICAL JOURNAL,2015,804(1).
APA	Skowron, J.,Shin, IG.,Udalski, A.,Han, C.,Sumi, T.,...&Gu SH.(2015).OGLE-2011-BLG-0265Lb: A JOVIAN MICROLENSING PLANET ORBITING AN M DWARF.ASTROPHYSICAL JOURNAL,804(1).
MLA	Skowron, J,et al."OGLE-2011-BLG-0265Lb: A JOVIAN MICROLENSING PLANET ORBITING AN M DWARF".ASTROPHYSICAL JOURNAL 804.1(2015).