MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert

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dc.citation.issue4
dc.citation.volume165
dc.contributor.authorOlmschenk G
dc.contributor.authorBennett DP
dc.contributor.authorBond IA
dc.contributor.authorZang W
dc.contributor.authorJung YK
dc.contributor.authorYee JC
dc.contributor.authorBachelet E
dc.contributor.authorAbe F
dc.contributor.authorBarry RK
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorHirao Y
dc.contributor.authorSilva SI
dc.contributor.authorItow Y
dc.contributor.authorKirikawa R
dc.contributor.authorKondo I
dc.contributor.authorKoshimoto N
dc.contributor.authorMatsubara Y
dc.contributor.authorMatsumoto S
dc.contributor.authorMiyazaki S
dc.contributor.authorMunford B
dc.contributor.authorMuraki Y
dc.contributor.authorOkamura A
dc.contributor.authorRanc C
dc.contributor.authorRattenbury NJ
dc.contributor.authorSatoh Y
dc.contributor.authorSumi T
dc.contributor.authorSuzuki D
dc.contributor.authorToda T
dc.contributor.authorTristram PJ
dc.contributor.authorVandorou A
dc.contributor.authorYama H
dc.contributor.authorAlbrow MD
dc.contributor.authorCha S-M
dc.contributor.authorChung S-J
dc.contributor.authorGould A
dc.contributor.authorHan C
dc.contributor.authorHwang K-H
dc.contributor.authorKim D-J
dc.contributor.authorKim H-W
dc.contributor.authorKim S-L
dc.contributor.authorLee C-U
dc.contributor.authorLee D-J
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
dc.contributor.authorRyu Y-H
dc.contributor.authorShin I-G
dc.contributor.authorShvartzvald Y
dc.contributor.authorChristie G
dc.contributor.authorCooper T
dc.contributor.authorDrummond J
dc.contributor.authorGreen J
dc.contributor.authorHennerley S
dc.contributor.authorMcCormick J
dc.contributor.authorMonard LAG
dc.contributor.authorNatusch T
dc.contributor.authorPorritt I
dc.contributor.authorTan T-G
dc.contributor.authorMao S
dc.contributor.authorMaoz D
dc.contributor.authorPenny MT
dc.contributor.authorZhu W
dc.contributor.authorBozza V
dc.contributor.authorCassan A
dc.contributor.authorDominik M
dc.contributor.authorHundertmark M
dc.contributor.authorJaimes RF
dc.contributor.authorKruszyńska K
dc.contributor.authorRybicki KA
dc.contributor.authorStreet RA
dc.contributor.authorTsapras Y
dc.contributor.authorWambsganss J
dc.contributor.authorWyrzykowski L
dc.contributor.authorZieliński P
dc.contributor.authorRau G
dc.date.accessioned2024-05-14T02:53:06Z
dc.date.available2024-05-14T02:53:06Z
dc.date.issued2023-03
dc.description.abstractWe 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 q=3.17-0.26+0.28×10-4, 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 mplanet=46-24+42M⊕ and a host star of mass Mhost=0.43-0.23+0.39M⊙, located at a distance DL=7.49-1.13+0.99kpc . For the second scenario, we estimate mplanet=69-34+37M⊕, Mhost=0.66-0.32+0.35M⊙, and DL=7.81-0.93+0.93kpc . The planet has a projected separation as a fraction of the Einstein ring radius s=1.3807-0.0018+0.0018 . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models
dc.description.confidentialfalse
dc.edition.editionApril 2023
dc.identifier.citationOlmschenk G, Bennett DP, Bond IA, Zang W, Jung YK, Yee JC, Bachelet E, Abe F, Barry RK, Bhattacharya A, Fujii H, Fukui A, Hirao Y, Silva SI, Itow Y, Kirikawa R, Kondo I, Koshimoto N, Matsubara Y, Matsumoto S, Miyazaki S, Munford B, Muraki Y, Okamura A, Ranc C, Rattenbury NJ, Satoh Y, Sumi T, Suzuki D, Toda T, Tristram PJ, Vandorou A, Yama H, Albrow MD, Cha SM, Chung SJ, Gould A, Han C, Hwang KH, Kim DJ, Kim HW, Kim SL, Lee CU, Lee DJ, Lee Y, Park BG, Pogge RW, Ryu YH, Shin IG, Shvartzvald Y, Christie G, Cooper T, Drummond J, Green J, Hennerley S, McCormick J, Monard LAG, Natusch T, Porritt I, Tan TG, Mao S, Maoz D, Penny MT, Zhu W, Bozza V, Cassan A, Dominik M, Hundertmark M, Jaimes RF, Kruszyńska K, Rybicki KA, Street RA, Tsapras Y, Wambsganss J, Wyrzykowski , Zieliński P, Rau G. (2023). MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert. Astronomical Journal. 165. 4.
dc.identifier.doi10.3847/1538-3881/acbcc8
dc.identifier.eissn1538-3881
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.number175
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69553
dc.languageEnglish
dc.publisherAmerican Astronomical Society
dc.publisher.urihttps://iopscience.iop.org/article/10.3847/1538-3881/acbcc8
dc.relation.isPartOfAstronomical Journal
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBinary Lens microlensing
dc.subjectGravitational Microlensing
dc.subjectGravitational Microlensing exoplanet detection
dc.titleMOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert
dc.typeJournal article
pubs.elements-id460984
pubs.organisational-groupOther
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