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

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

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number261
JournalAstronomical Journal
Volume159
Issue number6
DOIs
StatePublished - Jun 2020

Keywords

  • data behind figure

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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