J/ApJ/688/362ivo://CDS.VizieR/J/ApJ/688/362doi:10.26093/cds/vizier.16880362CDSLuhman K.L.Hernandez J.Downes J.J.Hartmann L.Briceno C.2017-12-05T05:10:36Z2011-01-31T14:53:42ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsinfrared-photometryWe have performed a census of circumstellar disks around brown dwarfs in the {sigma} Ori cluster using all available images from the Infrared Array Camera on board the Spitzer Space Telescope. To search for new low-mass cluster members with disks, we have measured photometry for all sources in the Spitzer images and have identified the ones that have red colors that are indicative of disks. We present five promising candidates, which may consist of two brown dwarfs, two stars with edge-on disks, and a low-mass protostar if they are bona fide members. Spectroscopy is needed to verify the nature of these sources. We have also used the Spitzer data to determine which of the previously known probable members of {sigma} Ori are likely to have disks. By doing so, we measure disk fractions of ~40% and ~60% for low-mass stars and brown dwarfs, respectively.2008ApJ...688..362Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/688/362CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/128/2316 : BVRIJHKs photometry in sigma Ori cluster (Sherry+, 2004)J/AN/325/705 : RIJHKs of low-mass stars in sigma Ori (Bejar+, 2004)J/A+A/446/501 : XMM observations of sigma Ori cluster (Franciosini+, 2006)J/ApJ/662/1067 : Sptizer observations of sigma Orionis (Hernandez+, 2007)J/A+A/493/931 : MAD observations of {sigma} Ori (Bouy+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/688/362https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/688/362http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/688/362https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/688/362https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/688/362http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/688/362GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/688/362/table1 (Spitzer photometry for 371 probable members of {sigma} Ori)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/688/362/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/688/362/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/688/362/table1?GETtext/xml+votable180.050000true84.3140417-2.51483330.0055555555555555566/22851 22854 228602.0616683193919197e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/688/362?format=asciiInfrareddefaultJ/ApJ/688/362/table1Spitzer photometry for 371 probable members of {sigma} OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS[2MASS IRAC] catalog source (1)meta.id;meta.datasetcharIDSource name (JHHMMSSss+DDMMSSs) (1)meta.id;meta.maincharONameOther designations (2)meta.idchar[3.6]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Uncertainty in [3.6]magstat.errorfloatnullablef_[3.6]why [3.6] is missing (3)meta.codechar[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Uncertainty in [4.5]magstat.errorfloatnullablef_[4.5]why [4.5] is missing (3)meta.codechar[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in [5.8]magstat.errorfloatnullablef_[5.8]why [5.8] is missing (3)meta.codechar[8.0]? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Uncertainty in [8.0]magstat.errorfloatnullablef_[8.0]why [8.0] is missing (3)meta.codecharDateDate(s) of observationstime.epochnullableSimbadNameSimbad column added by the CDSmeta.idcharHHM07Display the data from Hernandez et al. 2007, Cat. J/ApJ/662/1067meta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPositions from 2MASS or IRAC identifications (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS or IRAC identifications (declination part)degpos.eq.dec;meta.main