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A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb
journal contribution
posted on 2023-05-21, 11:52 authored by Poleski, R, Suzuki, D, Udalski, A, Xie, X, Yee, JC, Koshimoto, N, Gaudi, BS, Gould, A, Skowron, J, Szymanski, MK, Soszynski, I, Pietrukowicz, P, Kozlowski, S, Wyrzykowski, S, Ulaczyk, K, Abe, F, Barry, RK, Bennett, DP, Bhattacharya, A, Bond, IA, Donachie, M, Fujii, H, Fukui, A, Itow, Y, Hirao, Y, Kamei, Y, Kondo, I, Alex Li, MC, Matsubara, Y, Miyazaki, S, Muraki, Y, Nagakane, M, Ranc, C, Rattenbury, NJ, Satoh, YK, Shoji, H, Suematsu, H, Sullivan, DJ, Sumi, T, Tristram, PJ, Yamakawa, T, Yamawaki, T, Yonehara, A, Han, C, Dong, S, Morzinski, KM, Males, JR, Close, LM, Pogge, RW, Jean-Philippe BeaulieuJean-Philippe Beaulieu, Marquette, JBWe present the discovery of a planet on a very wide orbit in the microlensing event OGLE-2012-BLG-0838. The signal of the planet is well separated from the main peak of the event and the planet-star projected separation is found to be twice the Einstein ring radius, which corresponds to a projected separation of ~4 au. Similar planets around low-mass stars are very hard to find using any technique other than microlensing. We discuss microlensing model fitting in detail and discuss the prospects for measuring the mass and distance of the lens system directly.
History
Publication title
Astronomical JournalVolume
159Issue
6Article number
261Number
261Pagination
1-16ISSN
0004-6256Department/School
School of Natural SciencesPublisher
Univ Chicago PressPlace of publication
1427 E 60Th St, Chicago, USA, Il, 60637-2954Rights statement
© 2020. The American Astronomical Society. All rights reservedRepository Status
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