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ヨネハラ アツノリ
YONEHARA ATSUNORI
米原 厚憲 所属 京都産業大学 理学部 宇宙物理・気象学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2017/01 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | OGLE-2012-BLG-0950Lb: The First Planet Mass Measurement from Only Microlens Parallax and Lens Flux |
| 執筆形態 | その他 |
| 掲載誌名 | The Astronomical Journal |
| 巻・号・頁 | 153(1),pp.article id. 1 |
| 著者・共著者 | N. Koshimoto,A. Udalski,J. P. Beaulieu,T. Sumi,D. P. Bennett,I. A. Bond,N. Rattenbury,A. Fukui,V. Batista,J. B. Marquette,S. Brillant,F. Abe,Y. Asakura,A. Bhattacharya,M. Donachie,M. Freeman,Y. Hirao,Y. Itow,M. C. A. Li,C. H. Ling,K. Masuda,Y. Matsubara,T. Matsuo,Y. Muraki,K. Ohnishi,H. Oyokawa,To. Saito,A. Sharan,H. Shibai,D. J. Sullivan,D. Suzuki,P. J. Tristram,A. Yonehara,S. Kozlowski,P. Pietrukowicz,R. Poleski,J. Skowron,I. Soszynski,M. K. Szymanski,K. Ulaczyk,L. Wyrzykowski |
| 概要 | We report the discovery of a microlensing planet OGLE-2012-BLG-0950Lb with<br />
the planet/host mass ratio of $q \sim 2 \times 10^{-4}$. A long term distortion<br /> detected in both MOA and OGLE light curve can be explained by the microlens<br /> parallax due to the Earth's orbital motion around the Sun. Although the finite<br /> source effect is not detected, we obtain the lens flux by the high resolution<br /> Keck AO observation. Combining the microlens parallax and the lens flux reveal<br /> the nature of the lens: a planet with mass of $M_{\rm p} = 35^{+17}_{-9}<br /> M_{\oplus}$ is orbiting around a M-dwarf with mass of $M_{\rm host} =<br /> 0.56^{+0.12}_{-0.16} M_{\odot}$ with a planet-host projected separation of<br /> $r_{\perp} =2.7^{+0.6}_{-0.7}$ AU located at $D_{\rm L} = 3.0^{+0.8}_{-1.1}$<br /> kpc from us. This is the first mass measurement from only microlens parallax<br /> and the lens flux without the finite source effect. In the coming space<br /> observation-era with $Spitzer$, $K2$, $Euclid$, and $WFIRST$, we expect many<br /> such events for which we will not be able to measure any finite source effect.<br /> This work demonstrates an ability of mass measurements in such events. |
| arXiv ID | arXiv:1607.03267 |
| PermalinkURL | http://arxiv.org/abs/1607.03267v2 |