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MOA-2020-BLG-135Lb: a new Neptune-class planet for the extended MOA-II exoplanet microlens statistical analysis

We report the light-curve analysis for the event MOA-2020-BLG-135, which leads to the discovery of a new Neptune-class planet, MOA-2020-BLG-135Lb. With a derived mass ratio of and separation s ≈ 1, the planet lies exactly at the break and likely peak of the exoplanet mass-ratio function derived by t...

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Main Authors: Silva, Stela Ishitani (Author) , Ranc, Clément (Author) , Bennett, David P. (Author) , Bond, Ian A. (Author) , Zang, Weicheng (Author) , Abe, Fumio (Author) , Barry, Richard K. (Author) , Bhattacharya, Aparna (Author) , Fujii, Hirosane (Author) , Fukui, Akihiko (Author) , Hirao, Yuki (Author) , Itow, Yoshitaka (Author) , Kirikawa, Rintaro (Author) , Kondo, Iona (Author) , Koshimoto, Naoki (Author) , Matsubara, Yutaka (Author) , Matsumoto, Sho (Author) , Miyazaki, Shota (Author) , Muraki, Yasushi (Author) , Olmschenk, Greg (Author) , Okamura, Arisa (Author) , Rattenbury, Nicholas J. (Author) , Satoh, Yuki K. (Author) , Sumi, Takahiro (Author) , Suzuki, Daisuke (Author) , Toda, Taiga (Author) , Tristram, Paul J. (Author) , Vandorou, Aikaterini (Author) , Yama, Hibiki (Author) , Petric, Andreea (Author) , Burdullis, Todd (Author) , Fouqué, Pascal (Author) , Mao, Shude (Author) , Penny, Matthew T. (Author) , Zhu, Wei (Author) , Rau, Gioia (Author)
Format: Article (Journal)
Language:English
Published: [2022 September]
In: The astronomical journal
Year: 2022, Volume: 164, Issue: 3, Pages: 1-11
ISSN:1538-3881
DOI:10.3847/1538-3881/ac82b8
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/ac82b8
Verlag, lizenzpflichtig, Volltext: https://iopscience.iop.org/article/10.3847/1538-3881/ac82b8
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Author Notes:Stela Ishitani Silva, Clément Ranc, David P. Bennett, Ian A. Bond, Weicheng Zang (leading authors), Fumio Abe, Richard K. Barry, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Yasushi Muraki, Greg Olmschenk, Arisa Okamura, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama (The MOA Collaboration), and Andreea Petric, Todd Burdullis, Pascal Fouqué, Shude Mao, Matthew T. Penny, Wei Zhu (The CFHT Microlensing Collaboration), and Gioia Rau
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Summary:We report the light-curve analysis for the event MOA-2020-BLG-135, which leads to the discovery of a new Neptune-class planet, MOA-2020-BLG-135Lb. With a derived mass ratio of and separation s ≈ 1, the planet lies exactly at the break and likely peak of the exoplanet mass-ratio function derived by the Microlensing Observations in Astrophysics (MOA) Collaboration. We estimate the properties of the lens system based on a Galactic model and considering two different Bayesian priors: one assuming that all stars have an equal planet-hosting probability and the other that planets are more likely to orbit more-massive stars. With a uniform host mass prior, we predict that the lens system is likely to be a planet of mass and a host star of mass , located at a distance . With a prior that holds that planet occurrence scales in proportion to the host-star mass, the estimated lens system properties are , , and . This planet qualifies for inclusion in the extended MOA-II exoplanet microlens sample.
Item Description:Gesehen am 16.11.2022
Physical Description:Online Resource
ISSN:1538-3881
DOI:10.3847/1538-3881/ac82b8

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