J/ApJ/751/22ivo://CDS.VizieR/J/ApJ/751/22doi:10.26093/cds/vizier.17510022CDSBarsony M.Haisch K.E.Marsh K.A.McCarthy C.2018-01-04T08:21:57Z2012-11-19T09:47:05ZCDS support team

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

cds-question@unistra.frinfrared-sourcespre-main-sequence-starsWe present a general method for identifying the pre-main-sequence population of any star-forming region, unbiased with respect to the presence or absence of disks, in contrast to samples selected primarily via their mid-infrared emission from Spitzer surveys. We have applied this technique to a new, deep, wide-field, near-infrared imaging survey of the {rho} Ophiuchi cloud core to search for candidate low-mass members. In conjunction with published Spitzer IRAC photometry and least-squares fits of model spectra (COND, DUSTY, NextGen, and blackbody) to the observed spectral energy distributions, we have identified 948 candidate cloud members within our 90% completeness limits of J=20.0, H=20.0, and Ks=18.50. This population represents a factor of ~3 increase in the number of known young stellar objects in the {rho}} Ophiuchi cloud. A large fraction of the candidate cluster members (81%+/-3%) exhibit infrared excess emission consistent with the presence of disks, thus strengthening the possibility of their being bona fide cloud members. Spectroscopic follow-up will confirm the nature of individual objects, better constrain their parameters, and allow an initial mass function to be derived.2012ApJ...751...22Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/751/22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/289 : JKH photometry in LDN 1688 (Wilking+, 2008)J/A+A/372/173 : ISOCAM observations of the rho Oph cloud (Bontemps+, 2001)J/ApJ/566/993 : rho Oph (LDN 1688) cluster NICMOS imaging (Allen+, 2002)J/ApJ/613/393 : X-ray and radio sources in {rho} Oph Core A (Gagne+, 2004)J/AJ/130/1733 : Optical spectroscopy of {rho} Oph stars (Wilking+, 2005)J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)J/A+A/515/A75 : Low-mass population in {rho} Oph cloudhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/751/22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/751/22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/751/22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/751/22https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/751/22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/751/22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/751/22/table3 ({rho} Oph low-mass candidate members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/751/22/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/751/22/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/751/22/table3?GETtext/xml+votable180.050000true246.444625-24.30377780.005555555555555556Cone search capability for table J/ApJ/751/22/table4 (Photometry with recent sensitive NIR surveys)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/751/22/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/751/22/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/751/22/table4?GETtext/xml+votable180.050000true246.4904583-24.38821110.0055555555555555566/42981 429832.0616683193919197e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/751/22?format=asciiInfrareddefaultJ/ApJ/751/22/table3{rho} Oph low-mass candidate memberse_HmagThe 1{sigma} uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatKmagCIT K_s_ band magnitude (5)magphot.mag;em.IR.KfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/948] Index identification numbermeta.id;meta.mainintX4Simbad column added by the CDSmeta.ref.urlintnullableRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJmagCIT J band magnitude (5)magphot.mag;em.IR.Jfloate_JmagThe 1{sigma} uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatHmagCIT H band magnitude (5)magphot.mag;em.IR.Hfloate_KmagThe 1{sigma} uncertainty in Kmagmagstat.error;phot.mag;em.IR.KfloatF3.6? Spitzer/IRAC 3.6 micron band flux (1)mJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? The 1{sigma} uncertainty in F3.6 (1)mJystat.errorfloatnullableF4.5? Spitzer/IRAC 4.5 micron band flux (1)mJyphot.mag;em.IR.4-8umfloatnullablee_F4.5? The 1{sigma} uncertainty in F4.5 (1)mJystat.errorfloatnullableF5.8? Spitzer/IRAC 5.8 micron band flux (1)mJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8? The 1{sigma} uncertainty in F5.8 (1)mJystat.errorfloatnullableF8.0? Spitzer/IRAC 8.0 micron band flux (1)mJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0? The 1{sigma} uncertainty in F8.0 (1)mJystat.errorfloatnullableAVV band extinction (2)magphys.absorption;em.opt.VfloatTeff[730/5293] Effective temperature (3)Kphys.temperature.effectiveintn_Teff[BDCN] Model used for best fit (4)meta.notecharIRExcess (E) or Non-Excess (NE) sourcemeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/751/22/table4Photometry with recent sensitive NIR surveysSimbadNameSimbad column added by the CDSmeta.idcharl_Hmag[>] H magnitude limitmeta.code.errorcharHmagH magnitude, this workmagphot.mag;em.IR.HfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintX3Simbad column added by the CDSmeta.ref.urlintnullableRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainl_Jmag[>] J magnitude limitmeta.code.errorcharJmagJ magnitude, this workmagphot.mag;em.IR.Jfloatn_Jmag[a] binary (3)meta.notecharn_Hmag[a] binary (3)meta.notecharKmagKs magnitude, this workmagphot.mag;em.IR.Kfloatn_Kmag[ab] binary or saturated (3)meta.notecharAO? Identification in Alves de Oliveira (1)meta.id.crossintnullableJmag1? J magnitude, Alves de Oliveira (1)magphot.mag;em.IR.Jfloatnullablen_Jmag1[a] binary (3)meta.notecharHmag1? H magnitude, Alves de Oliveira (1)magphot.mag;em.IR.Hfloatnullablen_Hmag1[a] binary (3)meta.notecharKmag1? Ks magnitude, Alves de Oliveira (1)magphot.mag;em.IR.Kfloatnullablen_Kmag1[a] binary (3)meta.notecharM10? Identification in Marsh et al. 2010 (2)meta.id.crossintnullablen_M10[c] Individual note (3)meta.notecharJmag2? J magnitude, Marsh et al. 2010 (2)magphot.mag;em.IR.JfloatnullableHmag2? H magnitude, Marsh et al. 2010 (2)magphot.mag;em.IR.HfloatnullableKmag2? Ks magnitude, Marsh et al. 2010 (2)magphot.mag;em.IR.Kfloatnullablen_Kmag2[bc] Saturation (3)meta.notecharG11Identification in Geers et al. 2011ApJ...726...23Gmeta.id.crosscharn_G11[de] Individual notes (3)meta.notecharJmag3? J magnitude, Geers et al. 2011ApJ...726...23Gmagphot.mag;em.IR.JfloatnullableKmag3? Ks magnitude, Geers et al. 2011ApJ...726...23Gmagphot.mag;em.IR.Kfloatnullablen_Kmag3[s] if Kmag3 is saturatedmeta.notechar