J/MNRAS/457/4089ivo://CDS.VizieR/J/MNRAS/457/4089doi:10.26093/cds/vizier.74574089CDSShvartzvald Y.Maoz D.Udalski A.Sumi T.Friedmann M.Kaspi S.,Poleski R.Szymanski M.K.Skowron J.Kozlowski S.Wyrzykowski L.,Mroz P.Pietrukowicz P.Pietrzynski G.Soszynski I.Ulaczyk K.Abe F.,Barry R.K.Bennett D.P.Bhattacharya A.Bond I.A.Freeman M.,Inayama K.Itow Y.Koshimoto N.Ling C.H.Masuda K.Fukui A.,Matsubara Y.Muraki Y.Ohnishi K.Rattenbury N.J.Saito T.,Sullivan D.J.Suzuki D.Tristram P.J.Wakiyama Y.Yonehara A.2024-08-15T20:18:09Z2017-07-18T11:55:00ZCDS support team

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

cds-question@unistra.frsurveysgravitational-lensingmultiple-starssolar-system-planetsWe present a statistical analysis of the first four seasons from a 'second-generation' microlensing survey for extrasolar planets, consisting of near-continuous time coverage of 8 deg^2^ of the Galactic bulge by the Optical Gravitational Lens Experiment (OGLE), Microlensing Observations in Astrophysics (MOA), and Wise microlensing surveys. During this period, 224 microlensing events were observed by all three groups. Over 12 per cent of the events showed a deviation from single-lens microlensing, and for ~one-third of those the anomaly is likely caused by a planetary companion. For each of the 224 events, we have performed numerical ray-tracing simulations to calculate the detection efficiency of possible companions as a function of companion-to-host mass ratio and separation. Accounting for the detection efficiency, we find that 55^+34^_-22_ per cent of microlensed stars host a snowline planet. Moreover, we find that Neptune-mass planets are ~10 times more common than Jupiter-mass planets. The companion-to-host mass-ratio distribution shows a deficit at q~10^-2^, separating the distribution into two companion populations, analogous to the stellar-companion and planet populations, seen in radial-velocity surveys around solar-like stars. Our survey, however, which probes mainly lower mass stars, suggests a minimum in the distribution in the super-Jupiter mass range, and a relatively high occurrence of brown-dwarf companions.2016MNRAS.457.4089Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/457/4089CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AcA/50/1 : OGLE microlensing events in Galactic Bulge (Udalski+, 2000)J/AcA/51/175 : OGLE-II DIA microlensing events (Wozniak+, 2001)J/ApJ/636/240 : OGLE II microlensing parameters (Sumi+, 2006)J/ApJ/711/L48 : 2008 OGLE Bulge microlensing alerts (Cohen+, 2010)J/ApJS/216/12 : OGLE-III Galactic bulge microlensing events (Wyrzykowski+ 2015)J/ApJ/778/150 : MOA-II microlensing events toward the Bulge (Sumi+, 2013)J/ApJ/827/139 : MOA-II microlensing optical depth + event rates (Sumi+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/457/4089https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/457/4089http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/457/4089https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/457/4089https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/457/4089http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/457/4089GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 2.6706780932288093e-19defaultJ/MNRAS/457/4089/tablea1Event summaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number (1-224) + 6 (X1-X6) anomalous eventsmeta.recordcharOGLEOGLE number (NN-NNNN, EWS 20NN-BLG-NNNN)meta.idcharMOAMOA number (NN-NNN, MOA 20NN-BLG-NNN)meta.idcharmu0Minimum impact parametersrc.impactParamfloate_mu0rms uncertainty on mu0stat.errorfloatt0Time of the closest lens-source approach (HJD-2450000)dtime.epochdoublee_t0rms uncertainty on t0dstat.errorfloattEEinstein radius crossing time (the events time-scale)dtime.epochfloate_tErms uncertainty on tEdstat.errorfloatrho? Angular Einstein radius (rho=theta*/thetaE)phys.size.radius;arith.ratiodoublenullablee_rhorms uncertainty on rhostat.errordoublen_rho[*] Note on rho (1)meta.notecharpiEEEast component of the orbital microlens parallax vector piEpos.parallaxfloate_piEErms uncertainty on piEEstat.errorfloatn_piEE[*] Note on piEE (1)meta.notecharpiENNorth component of the orbital microlens parallax vector piEpos.parallaxfloate_piENrms uncertainty on piENstat.errorfloatn_piEN[*] Note on piEN (1)meta.notecharIblBaseline magnitudemagphot.mag;em.opt.Ifloate_Iblrms uncertainty on fblmagstat.errorfloatfblBaseline fluxphot.flux.density;em.opt.Ifloate_fblrms uncertainty on fblstat.errorfloat