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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, JB

We 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 Journal

Volume

159

Issue

6

Article number

261

Number

261

Pagination

1-16

ISSN

0004-6256

Department/School

School of Natural Sciences

Publisher

Univ Chicago Press

Place of publication

1427 E 60Th St, Chicago, USA, Il, 60637-2954

Rights statement

© 2020. The American Astronomical Society. All rights reserved

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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