J/AJ/164/75ivo://CDS.VizieR/J/AJ/164/75doi:10.26093/cds/vizier.51640075CDSBachelet E.Tsapras Y.Gould A.Street R.A.Bennett D.P.,Hundertmark M.P.G.Bozza V.Bramich D.M.Cassan A.Dominik M.Horne K.,Mao S.Saha A.Wambsganss J.Zang W.Abe F.Barry R.Bennett D.P.,Bhattacharya A.Bond I.A.Fukui A.Fujii H.Hirao Y.Itow Y.,Kirikawa R.Kondo I.Koshimoto N.Matsubara Y.Matsumoto S.,Miyazaki S.Muraki Y.Olmschenk G.Ranc C.Okamura A.Rattenbury N.J.,Satoh Y.Sumi T.Suzuki D.Silva S.I.Toda T.Tristram P..J.,Vandorou A.Yama H.Albrow M.D.Chung S.-J.Han C.Hwang K.-H.,Jung Y.K.Ryu Y.-H.Shin I.-G.Shvartzvald Y.Yee J.C.Cha S.-M.,Kim D.-J.Kim S.-L.Lee C.-U.Lee D.-J.Lee Y.Park B.-G.Pogge R.W.,Udalski A.Mroz P.Poleski R.Skowron J.Szymanski M.K.Soszynski I.,Pietrukowicz P.Kozlowski S.Ulaczyk K.Rybicki K.A.Iwanek P.,Wrona M.Gromadzki M.The ROME/REA CollaborationThe MOA Collaboration,The KMTNet CollaborationThe OGLE Collaboration2022-12-16T22:17:34Z2022-11-18T06:35:41ZCDS support team

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

cds-question@unistra.frgravitational-lensingbrown-dwarfsexoplanetsinfrared-photometryvisible-astronomyphotometryWe report on the observations, analysis and interpretation of the microlensing event MOA-2019-BLG-008. The observed anomaly in the photometric light curve is best described through a binary lens model. In this model, the source did not cross caustics and no finite-source effects were observed. Therefore, the angular Einstein ring radius {theta}E cannot be measured from the light curve alone. However, the large event duration, tE~80days, allows a precise measurement of the microlensing parallax {pi}E. In addition to the constraints on the angular radius {theta}* and the apparent brightness Is of the source, we employ the Besancon and GalMod galactic models to estimate the physical properties of the lens. We find excellent agreement between the predictions of the two galactic models: the companion is likely a resident of the brown dwarf desert with a mass Mp~30MJup, and the host is a main-sequence dwarf star. The lens lies along the line of sight to the Galactic bulge, at a distance of <~4kpc. We estimate that in about 10 yr the lens and source will be separated by ~55mas, and it will be possible to confirm the exact nature of the lensing system by using high-resolution imaging from ground- or space-based observatories.2022AJ....164...75Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/75CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/341 : VPHAS+ DR2 survey (Drew+, 2016)I/337 : Gaia DR1 (Gaia Collaboration, 2016)J/MNRAS/349/1059 : OGLE variables in Galactic bar (Wray+, 2004)J/ApJ/640/1051 : 25pc sample of Sun-like stars (Grether+, 2006)J/A+A/453/635 : Modelling Galactic Interstellar Extinction (Marshall+, 2006)J/ApJ/670/1367 : Gemini Deep Planet Survey (Lafreniere+, 2007)J/ApJ/680/728 : Diameters of exoplanet host stars (Baines+, 2008)J/ApJS/181/62 : Survey of young solar analogs (Metchev+, 2009)J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)J/A+A/529/A102 : MOA-2007-BLG-387Lb light curve I band (Batista+, 2011)J/ApJ/761/57 : CHARA array angular diameters of HR 8799 (Baines+, 2012)J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)J/other/Nat/481.167 : 2002-2007 PLANET microlensing events (Assan+, 2012)J/A+A/537/A116 : Variables in Centaurus field F170 (Pietrukowicz+, 2012)J/A+A/549/A147 : Abundances microlensed bulge dwarf stars. V. (Bensby+, 2013)J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)J/ApJ/771/40 : Main-sequence A, F, G, & K stars photometry (Boyajian+, 2013)J/A+A/558/A53 : Milky Way global survey star clusters. II. (Kharchenko+, 2013)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/AcA/63/21 : VI light curves of Galactic LPVs (Soszynski+, 2013)J/MNRAS/457/1320 : OGLE-III planet detection efficiency (Tsapras+, 2016)J/A+A/609/A116 : Low extinction TGAS HR Catalogue (Ruiz-Dern+, 2018)J/A+A/631/A125 : 54 massive companions detected with SOPHIE (Kiefer+, 2019)J/ApJS/244/29 : Microlensing events toward the Galactic bulge (Mroz+, 2019)J/AJ/158/13 : The first 300 stars observed by the GPIES (Nielsen+, 2019)J/ApJS/247/44 : Mira-like variables from the KELT survey (Arnold+, 2020)J/AJ/159/63 : New AO obs. of exoplanets & brown dwarf comp. (Bowler+, 2020)J/ApJ/903/L11 : OGLE & KMTNet light curve of OGLE-2016-BLG-1928 (Mroz+, 2020)J/A+A/649/A3 : Gaia EDR3 photometric passbands (Riello+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/75https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/75http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/75https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/75https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/75http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/75GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/164/75/fig2Light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTelTelescope identifiermeta.id;instr.telcharFiltFilter; V, R, I, gp, ip or rpinstr.filtercharHJD[2457800/2458931] Heliocentric Julian Datedtime.epochdoubleindexedmag[-12.6/21.5] Apparent magnitude in Filtermagphot.mag;em.optfloate_mag[0.001/3.5] Uncertainty in magmagstat.error;phot.magfloat