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MOA-2020-BLG-208Lb: cool sub-Saturn-mass planet within predicted desert

We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio , the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and ne...

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Main Authors: Olmschenk, Greg (Author) , Bennett, David P. (Author) , Bond, Ian A. (Author) , Zang, Weicheng (Author) , Jung, Youn Kil (Author) , Yee, Jennifer C. (Author) , Bachelet, Etienne (Author) , Abe, Fumio (Author) , Barry, Richard K. (Author) , Bhattacharya, Aparna (Author) , Fujii, Hirosane (Author) , Fukui, Akihiko (Author) , Hirao, Yuki (Author) , Silva, Stela Ishitani (Author) , Itow, Yoshitaka (Author) , Kirikawa, Rintaro (Author) , Kondo, Iona (Author) , Koshimoto, Naoki (Author) , Matsubara, Yutaka (Author) , Matsumoto, Sho (Author) , Miyazaki, Shota (Author) , Munford, Brandon (Author) , Muraki, Yasushi (Author) , Okamura, Arisa (Author) , Ranc, Clément (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) , Albrow, Michael D. (Author) , Cha, Sang-Mok (Author) , Chung, Sun-Ju (Author) , Gould, Andrew (Author) , Han, Cheongho (Author) , Hwang, Kyu-Ha (Author) , Kim, Dong-Jin (Author) , Kim, Hyoun-Woo (Author) , Kim, Seung-Lee (Author) , Lee, Chung-Uk (Author) , Lee, Dong-Joo (Author) , Lee, Yongseok (Author) , Park, Byeong-Gon (Author) , Pogge, Richard W. (Author) , Ryu, Yoon-Hyun (Author) , Shin, In-Gu (Author) , Shvartzvald, Yossi (Author) , Christie, Grant (Author) , Cooper, Tony (Author) , Drummond, John (Author) , Green, Jonathan (Author) , Hennerley, Steve (Author) , McCormick, Jennie (Author) , Monard, L. A. G. (Author) , Natusch, Tim (Author) , Porritt, Ian (Author) , Tan, Thiam-Guan (Author) , Mao, Shude (Author) , Maoz, Dan (Author) , Penny, Matthew T. (Author) , Zhu, Wei (Author) , Bozza, V. (Author) , Cassan, Arnaud (Author) , Dominik, Martin (Author) , Hundertmark, Markus (Author) , Jaimes, R. Figuera (Author) , Kruszyńska, K. (Author) , Rybicki, K. A. (Author) , Street, R. A. (Author) , Tsapras, Yiannis (Author) , Wambsganß, Joachim (Author) , Wyrzykowski, Ł (Author) , Zieliński, P. (Author) , Rau, Gioia (Author)
Format: Article (Journal)
Language:English
Published: 2023 March 24
In: The astronomical journal
Year: 2023, Volume: 165, Issue: 4, Pages: 1-11
ISSN:1538-3881
DOI:10.3847/1538-3881/acbcc8
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/acbcc8
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.3847/1538-3881/acbcc8
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Author Notes:Greg Olmschenk, David P. Bennett, Ian A. Bond, Weicheng Zang, Youn Kil Jung, Jennifer C. Yee, Etienne Bachelet, (Leading authors), Fumio Abe, Richard K. Barry, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Brandon Munford, Yasushi Muraki, Arisa Okamura, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, (The MOA Collaboration), Michael D. Albrow, Sang-Mok Cha, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu-Ha Hwang, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, (The KMTNet Collaboration), Grant Christie, Tony Cooper, John Drummond, Jonathan Green, Steve Hennerley, Jennie McCormick, L. A. G. Monard, Tim Natusch, Ian Porritt, Thiam-Guan Tan, (The MicroFUN Collaboration), Shude Mao, Dan Maoz, Matthew T. Penny, Wei Zhu, (The MAP Follow-Up Collaboration), V. Bozza, Arnaud Cassan, Martin Dominik, Markus Hundertmark, R. Figuera Jaimes, K. Kruszyńska, K. A. Rybicki, R. A. Street, Y. Tsapras, Joachim Wambsganss, Ł Wyrzykowski, P. Zieliński, (The OMEGA Collaboration), and Gioia Rau
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Summary:We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio , the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and near the edge of expected sample sensitivity. For these estimates we provide results using two mass-law priors: one assuming that all stars have an equal planet-hosting probability, and the other assuming that planets are more likely to orbit around more massive stars. In the first scenario, we estimate that the lens system is likely to be a planet of mass and a host star of mass , located at a distance . For the second scenario, we estimate , , and . The planet has a projected separation as a fraction of the Einstein ring radius . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models.
Item Description:Gesehen am 13.11.2023
Physical Description:Online Resource
ISSN:1538-3881
DOI:10.3847/1538-3881/acbcc8

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