MOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis

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dc.citation.issue3
dc.citation.volume164
dc.contributor.authorSilva SI
dc.contributor.authorRanc C
dc.contributor.authorBennett DP
dc.contributor.authorBond IA
dc.contributor.authorZang W
dc.contributor.authorAbe F
dc.contributor.authorBarry R
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorHirao Y
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.authorMuraki Y
dc.contributor.authorOlmschenk G
dc.contributor.authorOkamura A
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.authorPetric A
dc.contributor.authorBurdullis T
dc.contributor.authorFouqué P
dc.contributor.authorMao S
dc.contributor.authorPenny MT
dc.contributor.authorZhu W
dc.contributor.authorRau G
dc.date.accessioned2023-11-14T01:21:52Z
dc.date.accessioned2023-11-20T01:38:32Z
dc.date.available2022-08-31
dc.date.available2023-11-14T01:21:52Z
dc.date.available2023-11-20T01:38:32Z
dc.date.issued2022-09-01
dc.description.abstractWe 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 q = 1.52-0.31+0.39 ´ 10-4 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 mplanet = 11.3-6.9+19.2 MÅ and a host star of mass Mhost = 0.23-0.14+0.39 M☉, located at a distance DL = 7.9-1.0+1.0 kpc. With a prior that holds that planet occurrence scales in proportion to the host-star mass, the estimated lens system properties are mplanet = 25-15+22 MÅ, Mhost = 0.53-0.32+0.42 M☉, and DL = 8.3-1.0+0.9 kpc. This planet qualifies for inclusion in the extended MOA-II exoplanet microlens sample.
dc.description.confidentialfalse
dc.identifier.citationSilva SI, Ranc C, Bennett DP, Bond IA, Zang W, Abe F, Barry RK, Bhattacharya A, Fujii H, Fukui A, Hirao Y, Itow Y, Kirikawa R, Kondo I, Koshimoto N, Matsubara Y, Matsumoto S, Miyazaki S, Muraki Y, Olmschenk G, Okamura A, Rattenbury NJ, Satoh Y, Sumi T, Suzuki D, Toda T, Tristram PJ, Vandorou A, Yama H, Petric A, Burdullis T, Fouqué P, Mao S, Penny MT, Zhu W, Rau G. (2022). MOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis. Astronomical Journal. 164. 3.
dc.identifier.doi10.3847/1538-3881/ac82b8
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.number118
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69197
dc.languageEnglish
dc.publisherIOP Publishing on behalf of the American Astronomical Society
dc.publisher.urihttps://iopscience.iop.org/article/10.3847/1538-3881/ac82b8
dc.relation.isPartOfAstronomical Journal
dc.rights(c) 2022 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectGravitational microlensing
dc.subjectGravitational microlensing exoplanet detection
dc.subjectBinary lens microlensing –
dc.subjectExoplanet detection methods
dc.subjectExoplanets
dc.subjectExoplanet systems
dc.subjectExoplanet astronomy
dc.titleMOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis
dc.typeJournal article
pubs.elements-id457162
pubs.organisational-groupOther
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