J/ApJ/754/30ivo://CDS.VizieR/J/ApJ/754/30doi:10.26093/cds/vizier.17540030CDSPena Ramirez K.Bejar V.J.S.Zapatero Osorio M.R.Petr-Gotzens M.G.,Martin E.L.2021-08-04T07:31:34Z2014-03-28T09:21:48ZCDS support team

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

cds-question@unistra.frinfrared-photometryopen-star-clusterssurveysWe report on our analysis of the VISTA Orion ZY JHK_s_ photometric data (completeness magnitudes of Z=22.6 and J=21.0 mag) focusing on a circular area of 2798.4arcmin^2^ around the young {sigma} Orionis star cluster (~3Myr, ~352pc, and solar metallicity). The combination of the VISTA photometry with optical, WISE and Spitzer data allows us to identify a total of 210 {sigma} Orionis member candidates with masses in the interval 0.25-0.004M_{sun}_, 23 of which are new planetary-mass object findings. These discoveries double the number of cluster planetary-mass candidates known so far. One object has colors compatible with a T spectral type. The {sigma} Orionis cluster harbors about as many brown dwarfs (69, 0.072-0.012M_{sun}_) and planetary-mass objects (37, 0.012-0.004M_{sun}_) as very low mass stars (104, 0.25-0.072M_{sun}_). Based on Spitzer data, we derive a disk frequency of ~40% for very low mass stars, brown dwarfs, and planetary-mass objects in {sigma} Orionis. The radial density distributions of these three mass intervals are alike: all are spatially concentrated within an effective radius of 12' (1.2pc) around the multiple star {sigma} Ori, and no obvious segregation between disk-bearing and diskless objects is observed.2012ApJ...754...30Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/754/30CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)II/319 : UKIDSS-DR9 GCS (LAS and DXS) Surveys (Lawrence+ 2012)III/177 : H-alpha emission stars in the Orion region (Wiramihardja+ 1993)J/ApJ/743/64 : Deep infrared photometry of {sigma} Ori cluster (Bejar+, 2011)J/A+A/525/A47 : U-band photometry in sigma Orionis region (Rigliaco+, 2011)J/ApJS/191/389 : Photometric monitoring in {sigma} Ori cluster (Cody+, 2010)J/A+A/493/931 : MAD observations of {sigma} Ori (Bouy+, 2009)J/ApJ/688/362 : Disks around brown dwarfs in sig Ori cluster (Luhman+, 2008)J/A+A/488/167 : Low-mass stars in {sigma} Ori and {lambda} Ori (Sacco+, 2008)J/A+A/478/667 : The Mayrit catalogue (Caballero, 2008)J/MNRAS/385/2210 : Spectroscopy around lam Ori and sig Ori (Maxted+, 2008)J/MNRAS/375/1220 : BVI photometry of young stars in 10 clusters (Mayne+, 2007)J/ApJ/662/1067 : Spitzer observations of sigma Orionis (Hernandez+, 2007)J/A+A/446/501 : XMM observations of sigma Ori cluster (Franciosini+, 2006)J/MNRAS/356/1583 : RV of sig Ori low-mass candidate members (Burningham+, 2005)J/MNRAS/356/89 : sigma Ori low-mass stars (Kenyon+, 2005)J/A+A/419/249 : RJHKs photometry of sigma Ori low-mass stars (Scholz+, 2004)J/AN/325/705 : RIJHKs of low-mass stars in sigma Ori (Bejar+, 2004)J/AJ/128/2316 : BVRIJHKs photometry in sigma Ori cluster (Sherry+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/754/30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/754/30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/754/30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/754/30https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/754/30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/754/30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/754/30/photcand (Properties of known {sigma} Orionis photometric candidates (tables 6 and 7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/754/30/photcand?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/754/30/photcand?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/754/30/photcand?GETtext/xml+votable180.050000true84.9829583-2.85608330.005555555555555556Cone search capability for table J/ApJ/754/30/table8 (Near- and mid-infrared photometry of new {sigma} Orionis photometric candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/754/30/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/754/30/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/754/30/table8?GETtext/xml+votable180.050000true84.6104167-2.15713890.005555555555555556Cone search capability for table J/ApJ/754/30/youth (Properties of {sigma} Orionis candidate members with youth features (tables 3 and 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/754/30/youth?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/754/30/youth?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/754/30/youth?GETtext/xml+votable180.050000true84.6536667-2.6120.0055555555555555566/22851 22854 22857 228608.157980699529898e-21 2.393642124494231e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/754/30?format=asciiInfrareddefaultJ/ApJ/754/30/photcandProperties of known {sigma} Orionis photometric candidates (tables 6 and 7)SimbadNameSimbad column added by the CDSmeta.idcharl_[8.0][>= ] Limit flag on [8.0]meta.code.errorchare_Ymag[0.001/0.3] Ymag uncertaintymagstat.error;phot.magfloat[4.5][9.8/17]? Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainIReInfrared excess (G1)meta.codecharONameOther name(s)meta.id;meta.maincharRefReference(s) (see refs.dat file)meta.ref;pos.framecharl_Zmag[>= ] Limit flag on Zmagmeta.code.errorcharZmag[14/23.1] VISTA Z-band magnitudemagphot.mag;em.opt.Ifloate_Zmag[0.002/0.2]? Zmag uncertaintymagstat.error;phot.magfloatnullableYmag[13.5/21.3] VISTA Y-band magnitudemagphot.mag;em.IR.JfloatJmag[13/20.4] VISTA J-band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.001/0.2] Jmag uncertaintymagstat.error;phot.magfloatl_Hmag[>= ] Limit flag on Hmagmeta.code.errorcharHmag[12.1/19.9] VISTA H-band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.001/0.3]? Hmag uncertaintymagstat.error;phot.magfloatnullablel_Ksmag[>= ] Limit flag on Ksmagmeta.code.errorcharKsmag[11.6/18.9] VISTA Ks-band magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.002/0.3]? Ksmag uncertaintymagstat.error;phot.magfloatnullable[3.6][10.4/18.2]? Spitzer/IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.01/0.3]? [3.6] uncertaintymagstat.errorfloatnullablee_[4.5][0.02/0.3]? [4.5] uncertaintymagstat.errorfloatnullablel_[5.8][>= ] Limit flag on [5.8]meta.code.errorchar[5.8][9.1/16.1]? Spitzer/IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8][0.01/0.6]? [5.8] uncertaintymagstat.errorfloatnullable[8.0][8.4/15.2]? Spitzer/IRAC 8um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.02/0.6]? [8.0] uncertaintymagstat.errorfloatnullableW1mag[10.7/16.9]? WISE W1 (3.4um) magnitude (2)magphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.01/0.2]? W1mag uncertainty (2)magstat.error;phot.magfloatnullableW2mag[9.8/15.7]? WISE W2 (4.6um) magnitude (2)magphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.01/0.2]? W2mag uncertainty (2)magstat.error;phot.magfloatnullableW3mag[7.6/12.7]? WISE W3 (12um) magnitude (2)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0.02/0.3]? W3mag uncertainty (2)magstat.error;phot.magfloatnullableW4mag[3/8.4]? WISE W4 (22um) magnitude (2)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0.04/0.3]? W4mag uncertainty (2)magstat.error;phot.magfloatnullableSOriCross-match within 1" with sig Ori catalogs (J/ApJ/688/362, J/ApJ/662/1067, J/A+A/478/667 and J/AJ/128/2316)meta.ref.urlintnullableIRCross-match within 1" with UKIDSS and WISE catalogsmeta.ref.urlintnullableJ/ApJ/754/30/table8Near- and mid-infrared photometry of new {sigma} Orionis photometric candidatesl_Ymag[>= ] Limit flag on Ymagmeta.code.error;pos.cartesian.ycharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainZmag[20.4/23.2] VISTA Z-band magnitudemagphot.mag;em.opt.Ifloate_Zmag[0.05/0.5] Zmag uncertaintymagstat.error;phot.magfloatYmag[19.2/21.8] VISTA Y-band magnitudemagphot.mag;em.IR.Jfloate_Ymag[0.03/0.4]? Ymag uncertaintymagstat.error;phot.magfloatnullableJmag[18.2/20.5] VISTA J-band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.02/0.2] Jmag uncertaintymagstat.error;phot.magfloatHmag[17.6/19.6] VISTA H-band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.04/0.3] Hmag uncertaintymagstat.error;phot.magfloatl_Ksmag[>= ] Limit flag on Ksmagmeta.code.errorcharKsmag[17/19] VISTA Ks-band magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.06/0.3]? Ksmag uncertaintymagstat.error;phot.magfloatnullable[3.6][16.1/18.2]? Spitzer/IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.1/0.4]? [3.6] uncertaintymagstat.errorfloatnullable[4.5][15.8/17.5]? Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.1/0.4]? [4.5] uncertaintymagstat.errorfloatnullablel_[5.8][>= ] Limit flag on [5.8]meta.code.errorchar[5.8][16.1]? Spitzer/IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablel_[8.0][>= ] Limit flag on [8.0]meta.code.errorchar[8.0][15.2]? Spitzer/IRAC 8um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablen_SOriNote on source (1)meta.notecharSOriSource name (JHHMMSS.s+DDMMSS; <[BMZ2001] S Ori JHHMMSS.s+DDMMSS> in Simbad)meta.id;meta.maincharIRe[Y N OL] Infrared excess (G1)meta.codecharJ/ApJ/754/30/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibcodemeta.bib.bibcodecharAutFirst author's name(s)meta.bib.authorcharCommCommentmeta.notecharJ/ApJ/754/30/youthProperties of {sigma} Orionis candidate members with youth features (tables 3 and 5)SimbadNameSimbad column added by the CDSmeta.idcharl_[5.8][>= ] Limit flag on [5.8]meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainFeatYouth features (1)meta.notecharEnv[c] Enveloppe (1)meta.notecharIReInfrared excess (G1)meta.codecharONameOther name(s)meta.id;meta.maincharRefReference(s) (see refs.dat file)meta.ref;pos.framecharl_Zmag[>= ] Limit flag on Zmagmeta.code.errorcharZmag[14/23.1] VISTA Z-band magnitudemagphot.mag;em.opt.Ifloate_Zmag[0.002/0.2]? Zmag uncertaintymagstat.error;phot.magfloatnullableYmag[13.5/21.3] VISTA Y-band magnitudemagphot.mag;em.IR.Jfloate_Ymag[0.001/0.3] Ymag uncertaintymagstat.error;phot.magfloatJmag[13/20.4] VISTA J-band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.001/0.2] Jmag uncertaintymagstat.error;phot.magfloatl_Hmag[>= ] Limit flag on Hmagmeta.code.errorcharHmag[12.1/19.9] VISTA H-band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.001/0.3]? Hmag uncertaintymagstat.error;phot.magfloatnullablel_Ksmag[>= ] Limit flag on Ksmagmeta.code.errorcharKsmag[11.6/18.9] VISTA Ks-band magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.002/0.3]? Ksmag uncertaintymagstat.error;phot.magfloatnullable[3.6][10.4/18.2]? Spitzer/IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.01/0.3]? [3.6] uncertaintymagstat.errorfloatnullable[4.5][9.8/17]? Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.02/0.3]? [4.5] uncertaintymagstat.errorfloatnullable[5.8][9.1/16.1]? Spitzer/IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8][0.01/0.6]? [5.8] uncertaintymagstat.errorfloatnullablel_[8.0][>= ] Limit flag on [8.0]meta.code.errorchar[8.0][8.4/15.2]? Spitzer/IRAC 8um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.02/0.6]? [8.0] uncertaintymagstat.errorfloatnullableW1mag[10.7/16.9]? WISE W1 (3.4um) magnitude (2)magphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.01/0.2]? W1mag uncertainty (2)magstat.error;phot.magfloatnullableW2mag[9.8/15.7]? WISE W2 (4.6um) magnitude (2)magphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.01/0.2]? W2mag uncertainty (2)magstat.error;phot.magfloatnullableW3mag[7.6/12.7]? WISE W3 (12um) magnitude (2)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0.02/0.3]? W3mag uncertainty (2)magstat.error;phot.magfloatnullableW4mag[3/8.4]? WISE W4 (22um) magnitude (2)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0.04/0.3]? W4mag uncertainty (2)magstat.error;phot.magfloatnullableSOriCross-match within 1" with sig Ori catalogs (J/ApJ/688/362, J/ApJ/662/1067, J/A+A/478/667 and J/AJ/128/2316)meta.ref.urlintnullableIRCross-match within 1" with UKIDSS and WISE catalogsmeta.ref.urlintnullable