OGLE-2015-BLG-1771Lb: A Microlens Planet Orbiting an Ultracool Dwarf?

doi:10.3847/1538-3881/ab6f6d

CORC > 国家天文台 > 中国科学院国家天文台

	OGLE-2015-BLG-1771Lb: A Microlens Planet Orbiting an Ultracool Dwarf?
	Zhang,Xiangyu 2; Zang,Weicheng 2; Udalski,Andrzej 3; Gould,Andrew 1,4; Ryu,Yoon-Hyun 5; Wang,Tianshu 2,6; Yang,Hongjing 2; Mao,Shude 2,7; Mróz,Przemek 8; Skowron,Jan 3
刊名	The Astronomical Journal
	2020-02-20
卷号	159 期号:3
关键词	Gravitational microlensing exoplanet detection
ISSN号	0004-6256
DOI	10.3847/1538-3881/ab6f6d
英文摘要	Abstract We report the discovery and the analysis of the short ( days) planetary microlensing event, OGLE-2015-BLG-1771. The event was discovered by the Optical Gravitational Lensing Experiment, and the planetary anomaly (at I?～?19) was captured by The Korea Microlensing Telescope Network. The event has three surviving planetary models that explain the observed light curves, with planet-host mass ratio q?～?5.4?×?10?3, 4.5?×?10?3 and 4.5?×?10?2, respectively. The first model is the best-fit model, while the second model is disfavored by Δχ2?～?3. The last model is strongly disfavored by Δχ2?～?15 but not ruled out. A Bayesian analysis using a Galactic model indicates that the first two models are probably composed of a Saturn-mass planet orbiting a late M dwarf, while the third one could consist of a super-Jovian planet and a mid-mass brown dwarf. The source-lens relative proper motion is μrel?～?9 mas yr?1, so the source and lens could be resolved by current adaptive-optics instruments in 2020 if the lens is luminous.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-6256-159-3-AB6F6D
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/53947]
专题	中国科学院国家天文台
作者单位	1.Department of Astronomy,Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210, USA 2.Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, People's Republic of China zangwc17@mails.tsinghua.edu.cn 3.Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland 4.Max-Planck-Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany 5.Korea Astronomy and Space Science Institute, Daejon 34055, Republic of Korea 6.Department of Astrophysical Sciences, Princeton University, USA 7.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 8.Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA 9.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK 10.University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020, New Zealand
推荐引用方式 GB/T 7714	Zhang,Xiangyu,Zang,Weicheng,Udalski,Andrzej,et al. OGLE-2015-BLG-1771Lb: A Microlens Planet Orbiting an Ultracool Dwarf?[J]. The Astronomical Journal,2020,159(3).
APA	Zhang,Xiangyu.,Zang,Weicheng.,Udalski,Andrzej.,Gould,Andrew.,Ryu,Yoon-Hyun.,...&Pogge,Richard W..(2020).OGLE-2015-BLG-1771Lb: A Microlens Planet Orbiting an Ultracool Dwarf?.The Astronomical Journal,159(3).
MLA	Zhang,Xiangyu,et al."OGLE-2015-BLG-1771Lb: A Microlens Planet Orbiting an Ultracool Dwarf?".The Astronomical Journal 159.3(2020).