OGLE-2013-BLG-0911Lb: A Secondary on the Brown-dwarf Planet Boundary around an M Dwarf
文献类型：期刊论文
| 作者 | Miyazaki,Shota67; Sumi,Takahiro67; Bennett,David P.65,66; Udalski,Andrzej64; Shvartzvald,Yossi63; Street,Rachel62; Bozza,Valerio60,61; Yee,Jennifer C.59; Bond,Ian A.58; Rattenbury,Nicholas57 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2020-01-31 |
| 卷号 | 159期号:2 |
| ISSN号 | 0004-6256 |
| 关键词 | Gravitational microlensing Exoplanet astronomy Brown dwarfs Exoplanet systems Exoplanets Extrasolar gas giants Exoplanet detection methods M dwarf stars |
| DOI | 10.3847/1538-3881/ab64de |
| 英文摘要 | Abstract We present the analysis of the binary-lens microlensing event OGLE-2013-BLG-0911. The best-fit solutions indicate the binary mass ratio of q???0.03, which differs from that reported in Shvartzvald et al. The event suffers from the well-known close/wide degeneracy, resulting in two groups of solutions for the projected separation normalized by the Einstein radius of s?～?0.15 or s?～?7. The finite source and the parallax observations allow us to measure the lens physical parameters. The lens system is an M dwarf orbited by a massive Jupiter companion at very close ( , , ) or wide ( , , ) separation. Although the mass ratio is slightly above the planet-brown dwarf (BD) mass-ratio boundary of q?=?0.03, which is generally used, the median physical mass of the companion is slightly below the planet-BD mass boundary of 13MJup. It is likely that the formation mechanisms for BDs and planets are different and the objects near the boundaries could have been formed by either mechanism. It is important to probe the distribution of such companions with masses of ～13MJup in order to statistically constrain the formation theories for both BDs and massive planets. In particular, the microlensing method is able to probe the distribution around low-mass M dwarfs and even BDs, which is challenging for other exoplanet detection methods. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-6256-159-2-AB64DE |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28718]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Meteorologisches Institut, Universit?t Hamburg, Bundesstra?e 55, D-20146 Hamburg, Germany 2.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Via G. Pellegrino 19, I-84019 Vietri sul Mare (SA), Italy 3.Unidad de Astronomía, Fac. de Cs. Básicas, Universidad de Antofagasta, Avda U. de Antofagasta 02800, Antofagasta, Chile 4.CITEUCCentre for Earth and Space Science Research of the University of Coimbra, Observatório Geofísico e Astronómico da U.C., 3030-004 Coimbra, Portugal 5.Instituto de Astrofisica, Facultad de Fisica, Pontificia Universidad Catolica de Chile, Av. Vicuna Mackenna 4860,7820436 Macul, Santiago, Chile 6.Centre for Electronic Imaging, Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, UK 7.International Institute for Advanced Scientific Studies (IIASS), Via G. Pellegrino 19, I-84019 Vietri sul Mare (SA), Italy 8.Dipartimento di Fisica “E.R. Caianiello,” Università di Salerno, Via Giovanni Paolo II 132, Fisciano, I-84084, Italy 9.Department of Physics, Sharif University of Technology, P.O. Box 11155-9161 Tehran, Iran 10.Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicu?a Mackenna 4860, 7820436 Macul, Santiago, Chile |
| 推荐引用方式 GB/T 7714 | Miyazaki,Shota,Sumi,Takahiro,Bennett,David P.,et al. OGLE-2013-BLG-0911Lb: A Secondary on the Brown-dwarf Planet Boundary around an M Dwarf[J]. The Astronomical Journal,2020,159(2). |
| APA | Miyazaki,Shota.,Sumi,Takahiro.,Bennett,David P..,Udalski,Andrzej.,Shvartzvald,Yossi.,...&Verma,P..(2020).OGLE-2013-BLG-0911Lb: A Secondary on the Brown-dwarf Planet Boundary around an M Dwarf.The Astronomical Journal,159(2). |
| MLA | Miyazaki,Shota,et al."OGLE-2013-BLG-0911Lb: A Secondary on the Brown-dwarf Planet Boundary around an M Dwarf".The Astronomical Journal 159.2(2020). |
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