J/ApJ/778/96ivo://CDS.VizieR/J/ApJ/778/96doi:10.26093/cds/vizier.17780096CDSWillis S.Marengo M.Allen L.Fazio G.G.Smith H.A.Carey S.2017-12-15T10:55:45Z2015-05-22T11:59:25ZCDS support team

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

cds-question@unistra.frinfrared-photometryyoung-stellar-objectsmolecular-cloudsThis paper presents a study of the rate and efficiency of star formation in the NGC 6334 star-forming region. We obtained observations at J, H, and K_s_ taken with the NOAO Extremely Wide-Field Infrared Imager and combined them with observations taken with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope at wavelengths = 3.6, 4.5, 5.8, and 8.0{mu}m. We also analyzed previous observations taken at 24{mu}m using the Spitzer MIPS camera as part of the MIPSGAL survey. We have produced a point source catalog with >700000 entries. We have identified 2283 young stellar object (YSO) candidates, 375 Class I YSOs, and 1908 Class II YSOs using a combination of existing IRAC-based color classification schemes that we have extended and validated to the near-IR for use with warm Spitzer data. We have identified multiple new sites of ongoing star formation activity along filamentary structures extending tens of parsecs beyond the central molecular ridge of NGC 6334. By mapping the extinction, we derived an estimate for the gas mass, 2.2x10^5^M_{sun}_. The heavy concentration of protostars along the dense filamentary structures indicates that NGC 6334 may be undergoing a "mini-starburst" event with {Sigma}_SFR_>8.2M_{sun}_M/yr/pc2 and SFE>0.10. We have used these estimates to place NGC 6334 in the Kennicutt-Schmidt diagram to help bridge the gap between observations of local low-mass star-forming regions and star formation in other galaxies.2013ApJ...778...96Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/778/96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/337 : VISTA Variables in the Via Lactea Survey DR1 (Minniti+, 2014)J/A+A/558/A53 : MW global survey of star clusters. II. (Kharchenko+, 2013)J/ApJS/209/28 : MYStIX Wide-Field NIR data: crowded fields (King+, 2013)J/AJ/144/31 : IR photometry of protostar candidates (Kryukova+, 2012)J/ApJ/749/79 : Transition disks. II. Southern MoC (Romero+, 2012)J/A+A/538/A142 : OB stars in NGC 6334 and NGC 6357 (Russeil+, 2012)J/MNRAS/411/1597 : LMC point source classification in SAGE-Spec (Woods+, 2011)J/ApJ/723/1019 : Galactic SFR and gas surface densities (Heiderman+, 2010)J/ApJ/707/1 : Water and Methanol masers in NGC 6334I(N) (Brogan+, 2009)J/ApJS/185/198 : The Cepheus flare observed with IRAC and MIPS (Kirk+, 2009)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/AJ/138/227 : Stellar clusters in NGC 6334 complex (Feigelson+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/AJ/136/2413 : Galactic midplane Spitzer red sources (Robitaille+, 2008)J/ApJ/680/495 : Interstellar clouds in the Gould belt (Harvey+, 2008)J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)J/A+A/316/102 : JHK Photometry in NGC 6334 (Tapia+, 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/778/96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/778/96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/778/96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/778/96https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/778/96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/778/96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/778/96/table5 (NGC 6334 young stellar objects catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/778/96/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/778/96/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/778/96/table5?GETtext/xml+votable180.050000true259.52706667-36.173861110.005555555555555556Cone search capability for table J/ApJ/778/96/table1 (NGC 6334 point source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/778/96/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/778/96/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/778/96/table1?GETtext/xml+votable180.050000true259.48085-36.481730560.0055555555555555565/10614 6/424456.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/778/96?format=asciiInfrareddefaultJ/ApJ/778/96/table5NGC 6334 young stellar objects catalogSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/708805] Catalog running sequence numbermeta.id;meta.mainintRAJ2000[17] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[35/36] Degree of Declination (J2000)pos.eq.dec;meta.mainJmag[11.8/21.1]? NEWFIRM J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0/0.3]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? NEWFIRM H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag[9.7/17.8]? NEWFIRM Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.006/0.3]? Uncertainty in Kmagmagstat.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][2.6/17.4]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.001/0.3]? Uncertainty in [4.5]magstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in [5.8]magstat.errorfloatnullable[8.0][1.8/14.7]? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.007/0.3]? Uncertainty in [8.0]magstat.errorfloatnullable[24][0.6/9.3]? Spitzer/MIPS 24um band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24][0.007/0.5]? Uncertainty in [24]magstat.errorfloatnullableClassClassification (1)src.classcharSpInd[-3.9/6.1] Spectral index fit from K_S_ band longwardspect.index;meta.modelledfloatGLIMPSESources within 0.5" from GLIMPSE (II/293)meta.ref.urlintnullableIRCatSources within 0.5" from King et al. 2013, J/ApJS/209/28 and Minitti et al. 2014, II/337meta.ref.urlintnullableJ/ApJ/778/96/table1NGC 6334 point source catalog[24][0.6/9.3]? Spitzer/MIPS 24um band magnitudemagphot.flux.density;em.IR.15-30umfloatnullableHmag? NEWFIRM H band magnitudemagphot.mag;em.IR.HfloatnullableSeq[1/708805] Catalog running sequence numbermeta.id;meta.mainintprimaryRAJ2000[17] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000[35/36] Degree of Declination (J2000)pos.eq.dec;meta.mainJmag[11.8/21.1]? NEWFIRM J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0/0.3]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.Jfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag[9.7/17.8]? NEWFIRM Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.006/0.3]? Uncertainty in Kmagmagstat.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][2.6/17.4]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.001/0.3]? Uncertainty in [4.5]magstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in [5.8]magstat.errorfloatnullable[8.0][1.8/14.7]? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.007/0.3]? Uncertainty in [8.0]magstat.errorfloatnullablee_[24][0.007/0.5]? Uncertainty in [24]magstat.errorfloatnullableYSimbad column added by the CDSsrc.classnullableClassClassificationsrc.classchar