OGLE-2012-BLG-0950Lb: THE FIRST PLANET MASS MEASUREMENT FROM ONLY MICROLENS PARALLAX AND LENS FLUX

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, and, 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, M. Nagakane, K. Ohnishi, H. Oyokawa, To. Saito, A. Sharan, H. Shibai, D. J. Sullivan, D. Suzuki, P. J. Tristram, A. Yonehara, S. Kozłowski, P. Pietrukowicz, R. Poleski, J. Skowron, I. Soszyński, M. K. Szymański, K. Ulaczyk, Ł. Wyrzykowski

doi:10.48550/arxiv.1607.03267

<jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of a microlensing planet OGLE-2012-BLG-0950Lb with a planet/host mass ratio of <jats:inline-formula> <jats:tex-math> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajaa4766ieqn1.gif" xlink:type="simple"/> </jats:inline-formula>. A long term distortion detected in both MOA and OGLE light curve can be explained by the microlens parallax due to the Earth’s orbital motion around the Sun. Although the finite source effect is not detected, we obtain the lens flux by the high resolution Keck AO observation. Combining the microlens parallax and the lens flux reveal the nature of the lens: a planet with mass of <jats:inline-formula> <jats:tex-math> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajaa4766ieqn2.gif" xlink:type="simple"/> </jats:inline-formula> is orbiting around an M-dwarf with mass of <jats:inline-formula> <jats:tex-math> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajaa4766ieqn3.gif" xlink:type="simple"/> </jats:inline-formula> with a planet-host projected separation of <jats:inline-formula> <jats:tex-math> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajaa4766ieqn4.gif" xlink:type="simple"/> </jats:inline-formula> au located at <jats:inline-formula> <jats:tex-math> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ajaa4766ieqn5.gif" xlink:type="simple"/> </jats:inline-formula> kpc from us. This is the first mass measurement from only microlens parallax and the lens flux without the finite source effect. In the coming space observation-era with <jats:italic>Spitzer</jats:italic>, <jats:italic>K2</jats:italic>, <jats:italic>Euclid</jats:italic>, and <jats:italic>WFIRST</jats:italic>, we expect many such events for which we will not be able to measure any finite source effect. This work demonstrates an ability of mass measurements in such events.</jats:p>

OGLE-2012-BLG-0950Lb: THE FIRST PLANET MASS MEASUREMENT FROM ONLY MICROLENS PARALLAX AND LENS FLUX

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収録刊行物

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OGLE-2012-BLG-0950Lb: THE FIRST PLANET MASS MEASUREMENT FROM ONLY MICROLENS PARALLAX AND LENS FLUX

この論文をさがす

説明

収録刊行物

被引用文献 (14)*注記

参考文献 (78)*注記

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キーワード

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