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OGLE-2018-BLG-1185b : a low-mass microlensing planet orbiting a low-mass dwarf

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dc.contributor.authorKondo, Iona
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorBennett, David P.
dc.contributor.authorSumi, Takahiro
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorBond, Ian A.
dc.contributor.authorGould, Andrew
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorJung, Youn Kil
dc.contributor.authorZang, Weicheng
dc.contributor.authorBozza, Valerio
dc.contributor.authorBachelet, Etienne
dc.contributor.authorHundertmark, Markus P. G.
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorAbe, F.
dc.contributor.authorBarry, R.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorFukui, A.
dc.contributor.authorFujii, H.
dc.contributor.authorHirao, Y.
dc.contributor.authorIshitani Silva, S.
dc.contributor.authorItow, Y.
dc.contributor.authorKirikawa, R.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMiyazaki, S.
dc.contributor.authorMuraki, Y.
dc.contributor.authorOlmschenk, G.
dc.contributor.authorRanc, C.
dc.contributor.authorSatoh, Y.
dc.contributor.authorShoji, H.
dc.contributor.authorSuzuki, D.
dc.contributor.authorTanaka, Y.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamawaki, T.
dc.contributor.authorYonehara, A.
dc.contributor.authorMróz, P.
dc.contributor.authorPoleski, R.
dc.contributor.authorSkowron, J.
dc.contributor.authorSzymański, M. K.
dc.contributor.authorSoszyński, I.
dc.contributor.authorKozłowski, S.
dc.contributor.authorPietrukowicz, P.
dc.contributor.authorUlaczyk, K.
dc.contributor.authorRybicki, K. A.
dc.contributor.authorIwanek, P.
dc.contributor.authorWrona, M.
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S.-J.
dc.contributor.authorHan, C.
dc.contributor.authorHwang, K.-H.
dc.contributor.authorKim, H.-W.
dc.contributor.authorShin, I.-G.
dc.contributor.authorCha, S.-M.
dc.contributor.authorKim, D.-J.
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, R. W.
dc.contributor.authorRyu, Y.-H.
dc.contributor.authorBeichman, C. A.
dc.contributor.authorBryden, G.
dc.contributor.authorCalchi Novati, S.
dc.contributor.authorCarey, S.
dc.contributor.authorGaudi, B. S.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorZhu, W.
dc.contributor.authorMaoz, D.
dc.contributor.authorPenny, M. T.
dc.contributor.authorDominik, M.
dc.contributor.authorJørgensen, U. G.
dc.contributor.authorLonga-Peña, P.
dc.contributor.authorPeixinho, N.
dc.contributor.authorSajadian, S.
dc.contributor.authorSkottfelt, J.
dc.contributor.authorSnodgrass, C.
dc.contributor.authorTregloan-Reed, J.
dc.contributor.authorBurgdorf, M. J.
dc.contributor.authorCampbell-White, J.
dc.contributor.authorDib, S.
dc.contributor.authorFujii, Y. I.
dc.contributor.authorHinse, T. C.
dc.contributor.authorKhalouei, E.
dc.contributor.authorRahvar, S.
dc.contributor.authorRabus, M.
dc.contributor.authorSouthworth, J.
dc.contributor.authorTsapras, Y.
dc.contributor.authorStreet, R. A.
dc.contributor.authorBramich, D. M.
dc.contributor.authorCassan, A.
dc.contributor.authorHorne, K.
dc.contributor.authorWambsganss, J.
dc.contributor.authorMao, S.
dc.contributor.authorSaha, A.
dc.date.accessioned2022-07-08T23:38:27Z
dc.date.available2022-07-08T23:38:27Z
dc.date.issued2021-08-01
dc.identifier274624969
dc.identifieree3a6f09-4e78-4031-9dd8-b0b140780336
dc.identifier000679084500001
dc.identifier85113341833
dc.identifier.citationKondo , I , Yee , J C , Bennett , D P , Sumi , T , Koshimoto , N , Bond , I A , Gould , A , Udalski , A , Shvartzvald , Y , Jung , Y K , Zang , W , Bozza , V , Bachelet , E , Hundertmark , M P G , Rattenbury , N J , Abe , F , Barry , R , Bhattacharya , A , Donachie , M , Fukui , A , Fujii , H , Hirao , Y , Ishitani Silva , S , Itow , Y , Kirikawa , R , Li , M C A , Matsubara , Y , Miyazaki , S , Muraki , Y , Olmschenk , G , Ranc , C , Satoh , Y , Shoji , H , Suzuki , D , Tanaka , Y , Tristram , P J , Yamawaki , T , Yonehara , A , Mróz , P , Poleski , R , Skowron , J , Szymański , M K , Soszyński , I , Kozłowski , S , Pietrukowicz , P , Ulaczyk , K , Rybicki , K A , Iwanek , P , Wrona , M , Albrow , M D , Chung , S-J , Han , C , Hwang , K-H , Kim , H-W , Shin , I-G , Cha , S-M , Kim , D-J , Kim , S-L , Lee , C-U , Lee , D-J , Lee , Y , Park , B-G , Pogge , R W , Ryu , Y-H , Beichman , C A , Bryden , G , Calchi Novati , S , Carey , S , Gaudi , B S , Henderson , C B , Zhu , W , Maoz , D , Penny , M T , Dominik , M , Jørgensen , U G , Longa-Peña , P , Peixinho , N , Sajadian , S , Skottfelt , J , Snodgrass , C , Tregloan-Reed , J , Burgdorf , M J , Campbell-White , J , Dib , S , Fujii , Y I , Hinse , T C , Khalouei , E , Rahvar , S , Rabus , M , Southworth , J , Tsapras , Y , Street , R A , Bramich , D M , Cassan , A , Horne , K , Wambsganss , J , Mao , S & Saha , A 2021 , ' OGLE-2018-BLG-1185b : a low-mass microlensing planet orbiting a low-mass dwarf ' , Astronomical Journal , vol. 162 , no. 2 , 77 . https://doi.org/10.3847/1538-3881/ac00baen
dc.identifier.issn0004-6256
dc.identifier.otherBibCode: 2021arXiv210402157K
dc.identifier.otherORCID: /0000-0002-3202-0343/work/99804409
dc.identifier.urihttps://hdl.handle.net/10023/25639
dc.descriptionFunding: Work by I.K. was supported by JSPS KAKENHI grant No.20J20633. Work by J.C.Y. was supported by Jet Propulsion Laboratory grant 1571564. Work by D.P.B., A.B., and C.R. was supported by NASA through grant NASA-80NSSC18K0274. T.S. acknowledges financial support from the JSPS (JSPS23103002, JSPS24253004, and JSPS26247023). Work by N.K. is supported by JSPS KAKENHI grant No. JP18J00897. A.S. is a University of Auckland doctoral scholar. Y.T. acknowledges the support of DFG priority program SPP 1992 Exploring the Diversity of Extrasolar Planets (WA 1047/11-1). T.C.H. acknowledges financial support from the National Research Foundation (No. 2019R1I1A1A01059609). U.G.J. acknowledges support from H2020-MSCA-ITN-2019, grant No. 860470 (CHAMELEON), and the NovoNordisk Foundation grant No. NNF19OC0057374. W.Z. and S.M. acknowledge support by the National Science Foundation of China (grant Nos. 11821303 and 11761131004). Work by C.H. was supported by grants of the National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965). Funding for B.S.G. was provided by NASA grant NNG16PJ32C and the Thomas Jefferson Chair for Discovery and Space Exploration.en
dc.description.abstractWe report the analysis of planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based lightcurve indicates a low planet-host star mass ratio of q = (6.9 ± 0.2) x 10-5, which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability to host this planet. The flux variation observed by Spitzer was marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be ΔfSpz < 4 instrumental flux units indicates a host mass of Mhost = 0.37 +0.35-0.21 M⊙ and a planet mass of mp = 8.4+7.9-4.7 M⊕. A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of Mhost = 0.091+0.064-0.018 M⊙ and mp = 2.1+1.5-0.4 M⊕, respectively. Future high-resolution imaging observations with HST or ELTs could distinguish between these two scenarios and help to reveal the planetary system properties in more detail.
dc.format.extent18
dc.format.extent2933168
dc.language.isoeng
dc.relation.ispartofAstronomical Journalen
dc.subjectGravitational microlensingen
dc.subjectGravitational microlensing exoplanet detectionen
dc.subjectSatellite microlensing parallaxen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject3rd-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleOGLE-2018-BLG-1185b : a low-mass microlensing planet orbiting a low-mass dwarfen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Commissionen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.identifier.doi10.3847/1538-3881/ac00ba
dc.description.statusPeer revieweden
dc.identifier.urlhttp://adsabs.harvard.edu/abs/2021arXiv210402157Ken
dc.identifier.grantnumber860470en


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