J/AJ/140/968ivo://CDS.VizieR/J/AJ/140/968doi:10.26093/cds/vizier.51400968CDSRodriguez L.F.Rodney S.A.Reipurth B.2017-12-12T14:44:20Z2012-08-22T12:12:50ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-sourcesradio-sourcesWe present deep 3.6 cm radio continuum observations of the HII region W40 obtained using the Very Large Array (VLA) in its A and B configurations. We detect a total of 20 compact radio sources in a region of 4'x4', with 11 of them concentrated in a band with 30" of extent. We also present JHK photometry of the W40 cluster taken with the QUIRC instrument on the University of Hawaii 2.2m telescope. These data reveal that 15 of the 20 VLA sources have infrared counterparts, and 10 show radio variability with periods less than 20 days. Based on these combined radio and IR data, we propose that eight of the radio sources are candidate ultracompact HII regions, seven are likely to be young stellar objects, and two may be shocked interstellar gas.2010AJ....140..968Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/968CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/140/968https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/140/968http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/140/968https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/140/968https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/140/968http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/140/968GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/140/968/table1 (Extended photometry table of W40 IR sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/140/968/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/140/968/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/140/968/table1?GETtext/xml+votable180.050000true277.7624-2.03110.005555555555555556Cone search capability for table J/AJ/140/968/table2 (Parameters of the 3.6 cm VLA sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/140/968/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/140/968/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/140/968/table2?GETtext/xml+votable180.050000true277.81175833-2.063886110.0055555555555555566/303415.517905791682326e-24 1.6921341730348006e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/140/968?format=asciiInfraredRadiodefaultJ/AJ/140/968/table1Extended photometry table of W40 IR sourcese_JmagError in Jmagmagstat.error;phot.mag;em.IR.JfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRW40-IR sequential numbermeta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmagMKO J-band magnitudemagphot.mag;em.IR.JfloatHmagMKO H-band magnitudemagphot.mag;em.IR.Hfloate_HmagError in Hmagmagstat.error;phot.mag;em.IR.HfloatKmagMKO K'-band magnitudemagphot.mag;em.IR.Kfloate_KmagError in Kmagmagstat.error;phot.mag;em.IR.KfloatJ/AJ/140/968/table2Parameters of the 3.6 cm VLA sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVLAW40-VLA sequential numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainS3.6Flux density at 3.6cmmJyphot.flux.density;em.radio.6-12GHzfloatVar?[Y/N] Time variable?meta.codecharl_var[>~ ] Limit flag on varmeta.code.errorcharvar[1/17]? Ratio between the largest and the smallest flux density observedsrc.var.amplitudefloatnullableJmag? MKO J-band of the IR counterpartmagphot.mag;em.IR.JfloatnullableHmag? MKO H-band of the IR counterpartmagphot.mag;em.IR.HfloatnullableKmag? MKO K'-band of the IR counterpartmagphot.mag;em.IR.Kfloatnullablen_Kmag[b] Magnitudes from 2MASS (1)meta.notecharIRSW40-IRS designation, from Smith et al. (1985ApJ...291..571S), IRS Na, <NAME W 40 OS Na> in Simbadmeta.idcharSimbadSimbad column added by the CDSmeta.refchar