J/AJ/150/191ivo://CDS.VizieR/J/AJ/150/191doi:10.26093/cds/vizier.51500191CDSRivera-Galvez S.Roman-Zuniga C.G.Jimenez-Bailon E.Ybarra J.E.,Alves J.F.Lada E.A.2017-09-26T13:30:17Z2016-06-27T12:25:07ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometryWe present a multi-wavelength study of the young stellar population in the Cygnus-X DR15 region. We studied young stars that were forming or recently formed at and around the tip of a prominent molecular pillar and an infrared dark cloud. Using a combination of ground-based near-infrared, space-based infrared, and X-ray data, we constructed a point source catalog from which we identified 226 young stellar sources, which we classified into evolutionary classes. We studied their spatial distributions across the molecular gas structures and identified several groups that possibly belong to distinct young star clusters. We obtained samples of these groups and constructed K-band luminosity functions that we compared with those of artificial clusters, allowing us to make first order estimates of the mean ages and age spreads of the groups. We used a ^13^CO(1-0) map to investigate the gas kinematics at the prominent gaseous envelope of the central cluster in DR15, and we inferred that the removal of this envelope is relatively slow compared to other cluster regions, in which the gas dispersal timescale could be similar or shorter than the circumstellar disk dissipation timescale. The presence of other groups with slightly older ages, associated with much less prominent gaseous structures, may imply that the evolution of young clusters in this part of the complex proceeds in periods that last 3-5Myr, perhaps after a slow dissipation of their dense molecular cloud birthplaces.2015AJ....150..191Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/191CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/148/11 : Infrared photometry in Cygnus-X (Kryukova+, 2014)J/AJ/144/31 : Spitzer+2MASS photometry of protostar candidatesJ/ApJ/720/679 : Optical spectroscopy in Cygnus X region (Beerer+, 2010)J/A+A/375/539 : JHK photometry of compact HII regions in Cyg X (Comeron+, 2001)J/A+A/241/551 : Radio continuum in Cygnus X region (Wendker+ 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/191https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/191http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/191https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/191https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/191http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/191GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/150/191/sources (Sources in the DR15 region: Class I (table 2) , Class II (table 3) , and Class III (table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/150/191/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/150/191/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/150/191/sources?GETtext/xml+votable180.050000true308.09240.33811110.0055555555555555566/14667 14670 146926.772611666688002e-21 1.6430465931405664e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/150/191?format=asciiInfrareddefaultJ/AJ/150/191/sourcesSources in the DR15 region: Class I (table 2) , Class II (table 3) , and Class III (table 4)SimbadNameSimbad column added by the CDSmeta.idcharNameSource name (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClSource class (I, II, or III)src.classcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJmag[10.9/21.8]? J-band magnitude (1.209{mu}m) (2)magphot.mag;em.IR.Jfloatnullablee_Jmag[0.002/0.3]? The 1{sigma} error in Jmagmagstat.error;phot.mag;em.IR.Jfloatnullablef_Jmag[a] Upper limit or very poor photometry from 2MASSmeta.codecharHmag[9.9/20.1]? H-band magnitude (1.648{mu}m) (2)magphot.mag;em.IR.Hfloatnullablee_Hmag[0.005/0.2]? The 1{sigma} error in Hmagmagstat.error;phot.mag;em.IR.Hfloatnullablef_Hmag[a] Upper limit or very poor photometry from 2MASSmeta.codecharKmag[8.4/18.5]? K-band magnitude (2.208{mu}m) (2)magphot.mag;em.IR.Kfloatnullablee_Kmag[0.004/0.2]? The 1{sigma} error in Kmagmagstat.error;phot.mag;em.IR.Kfloatnullablef_Kmag[a] Upper limit or very poor photometry from 2MASSmeta.codechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar[3.6][6/16]? Spitzer/IRAC 3.6{mu}m band magnitude (3)magphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.01/0.3]? The 1{sigma} uncertainty in [3.6]magstat.errorfloatnullable[4.5][5/15]? Spitzer/IRAC 4.5{mu}m band magnitude (3)magphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.01/0.25]? The 1{sigma} uncertainty in [4.5]magstat.errorfloatnullable[5.8][5/14]? Spitzer/IRAC 5.8{mu}m band magnitude (3)magphot.flux.density;em.IR.4-8umfloatnullablee_[5.8][0.01/0.7]? The 1{sigma} uncertainty in [5.8]magstat.errorfloatnullable[8.0][4/14]? Spitzer/IRAC 8.0{mu}m band magnitude (3)magphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.01/4]? The 1{sigma} uncertainty in [8.0]magstat.errorfloatnullable[24][0.3/8]? Spitzer/MIPS 24{mu}m band magnitude (3)magphot.flux.density;em.IR.15-30umfloatnullablee_[24][0.01/0.8]? The 1{sigma} uncertainty in [24]magstat.errorfloatnullableEmed[0.8/5.4]? Median energy (4)keVem.energyfloatnullableFlux[1/217]? Total energy flux (in units of 10^-15^erg/cm^2^/s) (4)aW.m**-2phot.flux;em.X-raydoublenullable