J/A+A/626/A80ivo://CDS.VizieR/J/A+A/626/A80doi:10.26093/cds/vizier.36260080CDSCanovas H.Cantero C.Cieza L.Bombrun A.Lammers U.Merin B.,Mora A.Ribas A.Ruiz-Rodriguez D.2023-03-10T06:40:33Z2019-06-19T09:06:43ZCDS support team

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

cds-question@unistra.frmolecular-cloudsastronomical-object-identificationastrometryThe Ophiuchus cloud complex is one of the best laboratories to study the earlier stages of the stellar and protoplanetary disc evolution. We constructed a control sample composed of 188 bona fide Ophiuchus members. Using this sample as a reference we applied three different density-based machine learning clustering algorithms (DBSCAN, OPTICS, and HDBSCAN) to a sample drawn from the Gaia DR2 catalogue centred on the Ophiuchus cloud that contains 2300 sources covering a sky area of 38deg^2^. The clustering analysis was applied in the five astrometric dimensions defined by the three-dimensional Cartesian space and the proper motions in right ascension and declination. The three clustering algorithms systematically identify a similar set of candidate members in a main cluster with astrometric properties consistent with those of the control sample. We constructed a common sample containing 391 member candidates including 166 new objects, which have not yet been discussed in the literature. We built the SEDs for a subset of 48 objects and found a total of 41 discs.2019A&A...626A..80Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/626/A80CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/626/A80https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/626/A80http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/626/A80https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/626/A80https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/626/A80http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/626/A80GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/626/A80/table3 (Entire candidate members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A80/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A80/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A80/table3?GETtext/xml+votable180.050000true243.3719939-23.18554710.005555555555555556Cone search capability for table J/A+A/626/A80/tablea1 (Initial sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A80/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A80/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A80/tablea1?GETtext/xml+votable180.050000true245.2955417-23.72463890.0055555555555555565/10739 10742 10745 10747-10748 10750 6/42955 42966-42967 42972 42977-42979 42985 42987 43004 44356-44357 44368https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/626/A80?format=asciidefaultJ/A+A/626/A80/table3Entire candidate membersplxParallax (J2015.5)maspos.parallax.trigdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at epoch J2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at epoch J2015.5degpos.eq.dec;meta.mainpmRA*Proper motion in Right Ascension, pmRA*cosDE (J2015.5)mas/yrpos.pm;pos.eq.radoublepmDEProper motion in Declination (J2015.5)mas/yrpos.pm;pos.eq.decdoubleGDR2Gaia DR2 Source IDmeta.id;meta.mainprimaryControlControl sample membership (Y/N)meta.codecharDOHCandidate member by Dbscan/Optics/Hdbscanmeta.code.membercharPhotindicates photometry in table A4meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedJ/A+A/626/A80/tablea1Initial samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS Source IDmeta.idcharRefReferences (1)meta.refcharControlControl Sample Membershipmeta.codecharGDR2? Gaia DR 2 Source IDmeta.id;meta.mainnullable_RARight ascension (derived from 2MASS) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from 2MASS) for Eq=J2000degpos.eq.dec;meta.mainJ/A+A/626/A80/tablea4Photometry for subset of 48 candidate memberse_W3Flux1 sigma error on W3FluxW.m**-2stat.errordoubleW4FluxObserved Flux at WISE W4 passbandW.m**-2phot.flux.density;em.IR.15-30umdoublee_W4Flux1 sigma error on W4FluxW.m**-2stat.errordoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGDR2Gaia DR2 Source IDmeta.id;meta.mainGFluxObserved Flux at Gaia G passbandW.m**-2phot.flux.density;em.optdoublee_GFlux1 sigma error on GFluxW.m**-2stat.errordoubleBPFluxObserved Flux at Gaia G_BP passbandW.m**-2phot.flux.density;em.opt.Bdoublee_BPFlux1 sigma error on GbFluxW.m**-2stat.errordoubleRPFluxObserved Flux at Gaia G_RP passbandW.m**-2phot.flux.density;em.opt.Rdoublee_RPFlux1 sigma error on GrFluxW.m**-2stat.errordoubleJFluxObserved Flux at 2MASS J passbandW.m**-2phot.mag;em.IR.Jdoublee_JFlux1 sigma error on JFluxW.m**-2stat.errordoubleHFluxObserved Flux at 2MASS H passbandW.m**-2phot.flux.density;em.IR.Hdoublee_HFlux1 sigma error on HFluxW.m**-2stat.errordoubleKsFluxObserved Flux at 2MASS Ks passbandW.m**-2phot.mag;em.IR.Kdoublee_KsFlux1 sigma error on KsFluxW.m**-2stat.errordoubleW1FluxObserved Flux at WISE W1 passbandW.m**-2phot.mag;em.IR.3-4umdoublee_W1Flux1 sigma error on W1FluxW.m**-2stat.errordoubleW2FluxObserved Flux at WISE W2 passbandW.m**-2phot.mag;em.IR.4-8umdoublee_W2Flux1 sigma error on W2FluxW.m**-2stat.errordoubleW3FluxObserved Flux at WISE W3 passbandW.m**-2phot.flux.density;em.IR.8-15umdoubleSEDSED class (as detailed in Sect. 4.2)meta.code.classcharstatusIndicates previous observations (if any) (1)meta.codechar