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A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb


Poleski, R and Suzuki, D and Udalski, A and Xie, X and Yee, JC and Koshimoto, N and Gaudi, BS and Gould, A and Skowron, J and Szymanski, MK and Soszynski, I and Pietrukowicz, P and Kozlowski, S and Wyrzykowski, S and Ulaczyk, K and Abe, F and Barry, RK and Bennett, DP and Bhattacharya, A and Bond, IA and Donachie, M and Fujii, H and Fukui, A and Itow, Y and Hirao, Y and Kamei, Y and Kondo, I and Alex Li, MC and Matsubara, Y and Miyazaki, S and Muraki, Y and Nagakane, M and Ranc, C and Rattenbury, NJ and Satoh, YK and Shoji, H and Suematsu, H and Sullivan, DJ and Sumi, T and Tristram, PJ and Yamakawa, T and Yamawaki, T and Yonehara, A and Han, C and Dong, S and Morzinski, KM and Males, JR and Close, LM and Pogge, RW and Beaulieu, J-P and Marquette, JB, A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb, Astronomical Journal, 159, (6) Article 261. ISSN 0004-6256 (2020) [Refereed Article]

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DOI: doi:10.3847/1538-3881/ab8a49


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.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Beaulieu, J-P (Dr Jean-Philippe Beaulieu)
ID Code:152299
Year Published:2020
Web of Science® Times Cited:4
Deposited By:Plant Science
Deposited On:2022-08-16
Last Modified:2022-09-15

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