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

Bibcode
2020AJ....159..261P
DOI
10.3847/1538-3881/ab8a49
Poleski, R.; Suzuki, Daisuke; Udalski, A.; Xie, Xiaojia; Yee, J. C.; Koshimoto, Naoki; Gaudi, B. S.; Gould, A.; Skowron, J.; Szymański, M. K.; Soszyński, I.; Pietrukowicz, P.; Kozłowski, S.; Wyrzykowski, Ł.; Ulaczyk, K.; OGLE Collaboration; Abe, Fumio; Barry, Richard K.; Bennett, David. P.; Bhattacharya, Aparna; Bond, Ian A.; Donachie, Martin; Fujii, Hirosane; Fukui, Akihiko; Itow, Yoshitaka; Hirao, Yuki; Kamei, Yuhei; Kondo, Iona; Alex Li, Man Cheung; Matsubara, Yutaka; Miyazaki, Shota; Muraki, Yasushi; Nagakane, Masayuki; Ranc, Clément; Rattenbury, Nicholas J.; Satoh, Yuki K.; Shoji, Hikaru; Suematsu, Haruno; Sullivan, Denis J.; Sumi, Takahiro; Tristram, Paul J.; Yamakawa, Takeharu; Yamawaki, Tsubasa; Yonehara, Atsunori; MOA Collaboration; Han, C.; Dong, Subo; Morzinski, K. M.; Males, J. R.; Close, L. M.; Pogge, R. W.; Beaulieu, J. -P.; Marquette, J. -B.
Bibliographical reference

The Astronomical Journal

Advertised on:
6
2020
Number of authors
53
IAC number of authors
1
Citations
6
Refereed citations
5
Description
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.
Type
Refereed

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