J/ApJ/822/49ivo://CDS.VizieR/J/ApJ/822/49doi:10.26093/cds/vizier.18220049CDSJose J.Kim J.S.Herczeg G.J.Samal M.R.Bieging J.H.Meyer M.R.,Sherry W.H.2019-08-22T09:05:50Z2016-08-31T15:39:13ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometrymolecular-cloudsOne of the key questions in the field of star formation is the role of stellar feedback on the subsequent star formation process. The W3 giant molecular cloud complex at the western border of the W4 super bubble is thought to be influenced by the massive stars in W4. This paper presents a study of the star formation activity within AFGL 333, a ~10^4^M_{sun}_ cloud within W3, using deep JHKs photometry obtained from the NOAO Extremely Wide Field Infrared Imager combined with Spitzer IRAC and MIPS photometry. Based on the infrared excess, we identify 812 candidate young stellar objects (YSOs) in the complex, of which 99 are Class I and 713 are Class II sources. The stellar density analysis of YSOs reveals three major stellar aggregates within AFGL333, namely AFGL 333 Main, AFGL 333 NW1 and AFGL 333 NW2. The disk fraction within AFGL 333 is estimated to be ~50%-60%. We use the extinction map made from the H-K_s_ colors of the background stars and CO data to understand the cloud structure and to estimate the cloud mass. From the stellar and cloud mass associated with AFGL 333, we infer that the region is currently forming stars with an efficiency of ~4.5% and at a rate of ~2-3M_{sun}_/Myr/pc^2^. In general, the star formation activity within AFGL 333 is comparable to that of nearby low mass star-forming regions. We do not find any strong evidence to suggest that the stellar feedback from the massive stars of nearby W4 super bubble has affected the global star formation properties of the AFGL 333 region.2016ApJ...822...49Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/822/49CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/326 : Revised SWIRE photometric redshifts (Rowan-Robinson+, 2013)J/A+A/585/A49 : VCNS II. The IR-excess-selected population (Zeidler+, 2016)J/ApJ/813/42 : O and B type stars in W3: first results (Kiminki+, 2015)J/A+A/561/A12 : W3 Main JHKs photometry (Bik+, 2014)J/A+A/554/A3 : Vilnius photometry of IC1805 stars (Straizys+, 2013)J/ApJS/209/31 : The MYStIX IR-Excess Source catalog (MIRES) (Povich+, 2013)J/ApJ/778/96 : Spitzer and NEWFIRM observations of NGC 6334 (Willis+, 2013)J/ApJ/743/39 : Spitzer obs. of W3 molecular cloud (Rivera-Ingraham+, 2011)J/ApJS/196/18 : CO survey of galactic molecular clouds. II. (Bieging+, 2011)J/ApJ/726/19 : Intermediate-mass stars in IC 1805 (Wolff+, 2011)J/ApJ/723/1019 : Galactic SFR and gas surface densities (Heiderman+, 2010)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/688/1142 : Star formation in W5: Spitzer observations (Koenig+, 2008)J/AJ/136/2413 : Galactic midplane Spitzer red sources (Robitaille+, 2008)J/A+A/487/993 : MAMBO Mapping of c2d Clouds and Cores (Kauffmann+, 2008)J/MNRAS/379/663 : 850um observations of W3 giant molecular cloud (Moore+, 2007)J/ApJ/654/338 : Spitzer photometry in W3 molecular cloud (Ruch+, 2007)J/ApJ/651/502 : Spitzer IRAC photometry of M, L, and T dwarfs (Patten+, 2006)J/AJ/132/663 : Differential Velocities of very low mass SBs (Basri+, 2006)J/AJ/129/393 : UBV photometry in W3 (Oey+, 2005)J/A+A/397/177 : IR star clusters and stellar groups catalog (Bica+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/822/49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/822/49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/822/49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/822/49https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/822/49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/822/49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/822/49/table3 (Photometric data of all point sources within AFGL333)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/822/49/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/822/49/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/822/49/table3?GETtext/xml+votable180.050000true37.017461.44320.0055555555555555566/3307 36496.772611666688002e-21 1.706676739224234e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/822/49?format=asciiInfrareddefaultJ/ApJ/822/49/table3Photometric data of all point sources within AFGL3338.0mag[4.6/14]? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmag[6.1/21.5]? The NOAO/NEWFIRM J band magnitudemagphot.mag;em.IR.JfloatnullableHmag[5.3/20]? The NOAO/NEWFIRM H band magnitudemagphot.mag;em.IR.HfloatnullableKsmag[5.1/18]? The NOAO/NEWFIRM K_s_ band magnitudemagphot.mag;em.IR.Kfloatnullable3.6mag[3.7/17.6]? Spitzer/IRAC 3.6um band magnitudemagphot.mag;em.IR.3-4umfloatnullable4.5mag[3.9/17.1]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullable5.8mag[3.6/14.8]? Spitzer/IRAC 5.8um band magnitudemagphot.flux.density;em.IR.4-8umfloatnullable24mag[1/9.4]? Spitzer/MIPS 24um band magnitudemagphot.flux.density;em.IR.15-30umfloatnullableClassClassification (99 sources "I", 713 class "II", and 8908 "III/field star")src.classcharSCatDisplay data from the Spitzer catalog (Ruch+ 2007, J/ApJ/654/338) within 1"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar