J/ApJ/719/550ivo://CDS.VizieR/J/ApJ/719/550doi:10.26093/cds/vizier.17190550CDSMarsh K.A.Plavchan P.Kirkpatrick J.D.Lowrance P.J.Cutri R.M.,Velusamy T.2018-01-04T08:21:32Z2012-07-06T09:51:56ZCDS support team

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

cds-question@unistra.frinfrared-photometrylate-type-starseffective-temperaturestellar-massesyoung-stellar-objectsA search for young substellar objects in the {rho} Oph cloud core region has been made with the aid of multiband profile-fitting point-source photometry of the deep-integration Combined Calibration Scan images of the 2MASS extended mission in the J, H, and Ks bands, and Spitzer IRAC images at 3.6, 4.5, 5.8, and 8.0um. The field of view of the combined observations was 1{deg}x9.3', and the 5{sigma} limiting magnitude at J was 20.5. Comparison of the observed spectral energy distributions with the predictions of the COND and DUSTY models, for an assumed age of 1Myr, supports the identification of many of the sources with brown dwarfs and enables the estimation of effective temperature, T_eff_. The cluster members are then readily distinguishable from background stars by their locations on a plot of flux density versus T_eff_. The range of estimated T_eff_ values extends down to ~750K which, based on the COND model, would suggest the presence of objects of sub-Jupiter mass. The results also suggest that the mass function for the {rho} Oph cloud resembles that of the {sigma} Orionis cluster based on a recent study, with both rising steadily toward lower masses. The other main result from our study is the apparent presence of a progressive blueward skew in the distribution of J-H and H-Ks colors, such that the blue end of the range becomes increasingly bluer with increasing magnitude. We suggest that this behavior might be understood in terms of the "ejected stellar embryo" hypothesis, whereby some of the lowest-mass brown dwarfs could escape to locations close to the front edge of the cloud, and thereby be seen with less extinction.2010ApJ...719..550Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/719/550CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/281 : 2MASS 6X Point Source Working Database / Catalog (Cutri+ 2006)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+A/515/A75 : Low-mass population in {rho} Oph cloud (Alves de Oliveira+,J/A+A/519/A34 : YSOs in DROXO (Deep rho Oph XMM obs.) (Pillitteri+, 2010)J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)J/ApJ/671/1800 : SCUBA observations of {rho} Oph cloud (Andrews+, 2007)J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)J/AJ/130/1733 : Optical spectroscopy of {rho} Oph stars (Wilking+, 2005)J/ApJ/630/381 : Mid-IR imaging in {rho} Oph (Barsony+, 2005)J/A+A/429/963 : XMM-Newton observation of the rho Oph cloud (Ozawa+, 2005)http://irsa.ipac.caltech.edu/data/SPITZER/C2D/ : c2d Spitzer home pagehttp://www.ipac.caltech.edu/2mass/releases/allsky/doc/explsup.html :https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/719/550https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/719/550http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/719/550https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/719/550https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/719/550http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/719/550GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/719/550/table1 (Photometry and estimated effective temperatures, visual absorption, and masses of candidate cluster members in the {rho} Ophiuchi cloud core)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/719/550/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/719/550/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/719/550/table1?GETtext/xml+votable180.050000true246.8312917-24.69450.0055555555555555566/429813.9193497546148093e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/719/550?format=asciiInfrareddefaultJ/ApJ/719/550/table1Photometry and estimated effective temperatures, visual absorption, and masses of candidate cluster members in the {rho} Ophiuchi cloud corerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10/14819] Object index number <[MPK2010b] NNNNN> in Simbadmeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJmag? 2MASS deep J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS deep H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag? 2MASS deep Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Uncertainty in [3.6]magstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Uncertainty in [4.5]magstat.errorfloatnullableTeffEffective temperatureKphys.temperature.effectiveinte_TeffUncertainty in TeffKstat.error;phys.temperature.effectiveintAVVisual absorptionmagphys.absorption;em.opt.Vfloate_AVUncertainty in AVmagstat.errorfloatMassMasssolMassphys.massfloat2MDisplay the 2MASS point sources catalog if Ksmag<15 (Cat. II/246)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar