OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf
文献类型：期刊论文
| 作者 | Kondo,Iona47; Yee,Jennifer C.48; Bennett,David P.49,50; Sumi,Takahiro47; Koshimoto,Naoki51; Bond,Ian A.52; Gould,Andrew53,54; Udalski,Andrzej55; Shvartzvald,Yossi56; Jung,Youn Kil57,58 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2021-07-29 |
| 卷号 | 162期号:2 |
| ISSN号 | 0004-6256 |
| 关键词 | Gravitational microlensing Gravitational microlensing exoplanet detection Satellite microlensing parallax |
| DOI | 10.3847/1538-3881/ac00ba |
| 英文摘要 | Abstract We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet–host star mass ratio of q = (6.9 ± 0.2) × 10?5, which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability of hosting the planet. The flux variation observed by Spitzer is marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be ΔfSpz < 4 instrumental flux units yields a host mass of M host = 0.37 ? 0.21 + 0.35 M ⊙ and a planet mass of m p = 8.4 ? 4.7 + 7.9 M ⊕ . A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of M host = 0.091 ? 0.018 + 0.064 M ⊙ and m p = 2.1 ? 0.4 + 1.5 M ⊕ , respectively. Future high-resolution imaging observations with the Hubble Space Telescope or Extremely Large Telescope could distinguish between these two scenarios and help reveal the planetary system properties in more detail. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-6256-162-2-AC00BA |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/56614]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Kondo,Iona |
| 作者单位 | 1.Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand 2.Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan 3.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 4.Instituto de Astrofísica de Canarias, Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain 5.Department of Physics, The Catholic University of America, Washington, DC 20064, USA 6.Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France 7.University of Canterbury Mt. John Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand 8.Department of Physics, Faculty of Science, Kyoto Sangyo University, 603-8555 Kyoto, Japan 9.Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA 10.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK |
| 推荐引用方式 GB/T 7714 | Kondo,Iona,Yee,Jennifer C.,Bennett,David P.,et al. OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf[J]. The Astronomical Journal,2021,162(2). |
| APA | Kondo,Iona.,Yee,Jennifer C..,Bennett,David P..,Sumi,Takahiro.,Koshimoto,Naoki.,...&Saha,A..(2021).OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf.The Astronomical Journal,162(2). |
| MLA | Kondo,Iona,et al."OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf".The Astronomical Journal 162.2(2021). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。