J/AJ/128/1254ivo://CDS.VizieR/J/AJ/128/1254doi:10.26093/cds/vizier.51281254CDSLada C.J.Muench A.A.Lada E.A.Alves J.F.2005-05-24T21:11:53Z2005-05-24T21:10:51ZCDS support team

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

cds-question@unistra.frinfrared-photometryopen-star-clustersinfrared-sourcesWe present deep 3.8{mu}m L' imaging observations of the Trapezium cluster in Orion obtained with the ESO VLT. We use these observations to (1) search for infrared excess emission and evidence for protoplanetary disks associated with the faint, substellar population of this young cluster and (2) investigate the nature and extent of a recently discovered population of deeply embedded sources located in dense molecular gas behind the cluster. We detected 38 L' sources with substellar luminosities. In addition, we detected 24 L' sources that were spectroscopically classified as substellar objects in previous studies. Examining the infrared colors of all these sources, we determine an infrared excess fraction of 50%{+/-}20% from the J, H, K_s_ and L' colors for both the luminosity-selected and spectroscopically selected substellar samples.2004AJ....128.1254Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/128/1254CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/573/366 : Infrared photometry of Trapezium cluster (Muench+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/128/1254https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/128/1254http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/128/1254https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/128/1254https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/128/1254http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/128/1254GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/128/1254/table2 (VLT 3.8 Micron Trapezium Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1254/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1254/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1254/table2?GETtext/xml+votable180.050000true83.76739167-5.373477780.0055555555555555566/21439https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/128/1254?format=asciiInfrareddefaultJ/AJ/128/1254/table2VLT 3.8 Micron Trapezium CatalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[LML2004]Sequential running number (1)charn_L'magDetection/photometry flag (2)intRAJ2000Hour of right ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000) (3)pos.eq.dec;meta.mainPosFlag[0/2] Astrometry flag (4)intINameImage name (5)charXpos? X pixel on imagepixdoublenullableYpos? Y pixel on imagepixdoublenullablea_L'mag? Beam size of photometryarcsecfloatnullableL'mag? The VLT L' (3.80{mu}m) magnitudemagfloatnullablee_L'mag? Error in L'magmagfloatnullableMLLAOptical identification (6)char[HC2000]Infrared identification (7)char[H97b]Optical identification (8)char