J/AJ/165/175ivo://CDS.VizieR/J/AJ/165/175doi:10.26093/cds/vizier.51650175CDSOlmschenk G.Bennett D.P.Bond I.A.Zang W.Jung Y.K.Yee J.C.,Bachelet E.Abe F.Barry R.K.Bhattacharya A.Fujii H.Fukui A.,Hirao Y.Silva S.I.Itow Y.Kirikawa R.Kondo I.Koshimoto N.,Matsubara Y.Matsumoto S.Miyazaki S.Munford B.Muraki Y.,Okamura A.Ranc C.Rattenbury N.J.Satoh Y.Sumi T.Suzuki D.,Toda T.Tristram P.J.Vandorou A.Yama H.Albrow M.D.Cha S.-M.,Chung S.-J.Gould A.Han C.Hwang K.-H.Kim D.-J.Kim H.-W.,Kim S.-L.Lee C.-U.Lee D.-J.Lee Y.Park B.-G.Pogge R.W.,Ryu Y.-H.Shin I.-G.Shvartzvald Y.Christie G.Cooper T.,Drummond J.Green J.Hennerley S.McCormick J.Monard L.A.G.,Natusch T.Porritt I.Tan T.-G.Mao S.Maoz D.Penny M.T.Zhu W.,Bozza V.Cassan A.Dominik M.Hundertmark M.Jaimes R.F.,Kruszynska K.Rybicki K.A.Street R.A.Tsapras Y.Wambsganss J.,Wyrzykowski L.Zielinski P.Rau G.Leading authors,The MOA CollaborationThe KMTNet Collaboration,The MicroFUN CollaborationThe MAP Follow-Up Collaboration,The OMEGA Collaboration2023-10-20T13:15:24Z2023-09-22T07:12:12ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgravitational-lensingexoplanetsinfrared-photometryvisible-astronomyphotometryWe 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^e-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 M_p_=46_-24_^+42^M{Earth} and a host star of mass M_s_=0.43_-0.23_^+0.39^M{sun}, located at a distance D_L_=7.49_-1.13_^+0.99^kpc. For the second scenario, we estimate M_p_=69_-34_^+37^M{Earth}, M_s_=0.66_-0.32_^+0.35^M{sun}, and D_L_=7.81_-0.93_^+0.93^kpc. 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.2023AJ....165..175Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/175CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/other/Nat/481.167 : 2002-2007 PLANET microlensing events (Assan+, 2012)J/AJ/158/13 : First 300 stars observed by the GPIES (Nielsen+, 2019)J/AJ/161/54 : VRI photometry of MOA 2009-BLG-319 (Terry+, 2021)J/AJ/164/118 : VRI light curve MOA 2020-BLG-135 (Ishitani Silva+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/175https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/175http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/175https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/175https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/175http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/175GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/165/175/fig1The MOA-2020-BLG-208 event light curveHJD[9000/9140] Heliocentric Julian Date; HJD-2450000dtime.epochdoublemag[0.91/43.1] Magnitudemagphot.mag;em.optfloate_mag[0.008/4] Uncertainty in magmagstat.error;phot.magfloatInstInstrument identifier (1)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint