KMT-2017-BLG-0165Lb: A Super-Neptune-mass Planet Orbiting a Sun-like Host Star
文献类型：期刊论文
| 作者 | Kil Jung,Youn1,3; Gould,Andrew1,3,4,5; Zang,Weicheng1,6,17; Hwang,Kyu-Ha1,3; Ryu,Yoon-Hyun1,3; Han,Cheongho1,2; Yee,Jennifer C.1,7; Albrow,Michael D.8; Chung,Sun-Ju3,9; Shin,In-Gu7 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2019-01-25 |
| 卷号 | 157期号:2 |
| 关键词 | binaries: general gravitational lensing: micro planetary systems |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/aaf87f |
| 英文摘要 | Abstract We report the discovery of a low-mass-ratio planet (q?=?1.3?×?10?4), i.e., 2.5 times higher than the Neptune/Sun ratio. The planetary system was discovered from the analysis of the KMT-2017-BLG-0165 microlensing event, which has an obvious short-term deviation from the underlying light curve produced by the host of the planet. Although the fit improvement with the microlens parallax effect is relatively low, one component of the parallax vector is strongly constrained from the light curve, making it possible to narrow down the uncertainties of the lens physical properties. A Bayesian analysis yields that the planet has a super-Neptune mass orbiting a Sun-like star located at 4.5 kpc. The blended light is consistent with these host properties. The projected planet-host separation is , implying that the planet is located outside the snow line of the host, i.e., asl?～?2.1 au. KMT-2017-BLG-0165Lb is the sixteenth microlensing planet with mass ratio q??3.3, is quite severe. Alternatively, the distribution is also suggestive of a pileup of planets at Neptune-like mass ratios, below which there is a dramatic drop in frequency. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-6256-157-2-AAF87F |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/24679]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.The KMTNet Collaboration. 2.Department of Physics, Chungbuk National University, Cheongju 28644, Republic of Korea 3.Korea Astronomy and Space Science Institute, Daejon 34055, Republic of Korea 4.Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210, USA 5.Max-Planck-Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany 6.Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, People's Republic of China 7.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA 8.University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020, New Zealand 9.Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea 10.IPAC, Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USA |
| 推荐引用方式 GB/T 7714 | Kil Jung,Youn,Gould,Andrew,Zang,Weicheng,et al. KMT-2017-BLG-0165Lb: A Super-Neptune-mass Planet Orbiting a Sun-like Host Star[J]. The Astronomical Journal,2019,157(2). |
| APA | Kil Jung,Youn.,Gould,Andrew.,Zang,Weicheng.,Hwang,Kyu-Ha.,Ryu,Yoon-Hyun.,...&Wang,Tianshu.(2019).KMT-2017-BLG-0165Lb: A Super-Neptune-mass Planet Orbiting a Sun-like Host Star.The Astronomical Journal,157(2). |
| MLA | Kil Jung,Youn,et al."KMT-2017-BLG-0165Lb: A Super-Neptune-mass Planet Orbiting a Sun-like Host Star".The Astronomical Journal 157.2(2019). |
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