OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star
文献类型：期刊论文
| 作者 | Han,Cheongho35; Bennett,David P.1,2; Udalski,Andrzej3; Gould,Andrew4,5,6; Bond,Ian A.7; Shvartzvald,Yossi8; Nikolaus,Kay-Sebastian9; Hundertmark,Markus9; Bozza,Valerio10,34; Cassan,Arnaud11 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2019-08-19 |
| 卷号 | 158期号:3 |
| ISSN号 | 0004-6256 |
| 关键词 | gravitational lensing: micro planetary systems |
| DOI | 10.3847/1538-3881/ab2f74 |
| 英文摘要 | Abstract We report a multiplanetary system found from the analysis of microlensing event OGLE-2018-BLG-1011, for which the light curve exhibits a double-bump anomaly around the peak. We find that the anomaly cannot be fully explained by the binary-lens or binary-source interpretations and its description requires the introduction of an additional lens component. The 3L1S (three lens components and a single source) modeling yields three sets of solutions, in which one set of solutions indicates that the lens is a planetary system in a binary, while the other two sets imply that the lens is a multiplanetary system. By investigating the fits of the individual models to the detailed light curve structure, we find that the multiple-planet solution with planet-to-host mass ratios ～9.5?×?10?3 and ～15?×?10?3 are favored over the other solutions. From the Bayesian analysis, we find that the lens is composed of two planets with masses and around a host with a mass and located at a distance . The estimated distance indicates that the lens is the farthest system among the known multiplanetary systems. The projected planet–host separations are ( ) and , where the values of a⊥,2 inside and outside the parenthesis are the separations corresponding to the two degenerate solutions, indicating that both planets are located beyond the snow line of the host, as with the other four multiplanetary systems previously found by microlensing. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-6256-158-3-AB2F74 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27372]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 2.Department of Astronomy, University of Maryland, College Park, MD 20742, USA 3.Warsaw University Observatory, Al.?Ujazdowskie 4, 00-478 Warszawa, Poland 4.Korea Astronomy and Space Science Institute, Daejon 34055, Republic of Korea 5.Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210, USA 6.Max Planck Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany 7.Institute of Natural and Mathematical Sciences, Massey University, Auckland 0745, New Zealand 8.IPAC, Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USA 9.Zentrum für Astronomie der Universit?t Heidelberg, Astronomisches Rechen-Institut, M?nchhofstr.?12-14, D-69120 Heidelberg, Germany 10.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cintia, I-80126 Napoli, Italy |
| 推荐引用方式 GB/T 7714 | Han,Cheongho,Bennett,David P.,Udalski,Andrzej,et al. OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star[J]. The Astronomical Journal,2019,158(3). |
| APA | Han,Cheongho.,Bennett,David P..,Udalski,Andrzej.,Gould,Andrew.,Bond,Ian A..,...&Stassun,Keivan G..(2019).OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star.The Astronomical Journal,158(3). |
| MLA | Han,Cheongho,et al."OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star".The Astronomical Journal 158.3(2019). |
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来源：国家天文台
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