J/A+A/527/A77ivo://CDS.VizieR/J/A+A/527/A77doi:10.26093/cds/vizier.35270077CDSPrisinzano L.Sanz-Forcada J.Micela G.Caramazza M.Guarcello M.G.,Sciortino S.Testi L.2012-06-12T12:13:22Z2011-01-28T08:01:13ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomyWide-band photometrymillimeter-astronomyphotometrysubmillimeter-astronomyDifferent environmental conditions can play a crucial role in determining final products of the star formation process and in this context, less favorable activities of star formation are expected in the external regions of our Galaxy. We studied the properties of the young open cluster NGC 1893 located about 12kpc from the galactic center, to investigate how different physical conditions can affect the process of star formation. By adopting a multiwavelength approach, we compiled a catalog extending from X-rays to NIR data to derive the cluster membership. In addition, optical and NIR photometric properties are used to evaluate the cluster parameters. We find 415 diskless candidate members plus 1061 young stellar objects with a circumstellar disk or class II candidate members, 125 of which are also H{alpha} emitters. Considering the diskless candidate members, we find that the cluster distance is 3.6+/-0.2kpc and the mean interstellar reddening is E(B-V)=0.6+/-0.1 with evidence of differential reddening in the whole surveyed region. NGC 1893 contains a conspicuous population of pre-main sequence stars together with the well studied main sequence cluster population; we found a disk fraction of about 70% similar to that found in clusters of similar age in the solar neighbor and then, despite expected unfavorable conditions for star formation, we conclude that very rich young clusters can form also in the outer regions of our Galaxy.2011A&A...527A..77Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/527/A77CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/488/211 : Infrated photometry of NGC 1893 (Caramazza+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/527/A77https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/527/A77http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/527/A77https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/527/A77https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/527/A77http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/527/A77GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/527/A77/clas0-2 (VRI H-alpha and infrared magnitudes of Class 0/I/II candidate members (table 5 and 7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/527/A77/clas0-2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/527/A77/clas0-2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/527/A77/clas0-2?GETtext/xml+votable180.050000true80.62207733.5139640.005555555555555556Cone search capability for table J/A+A/527/A77/diskless (VRI H-alpha and infrared magnitudes of diskless candidate members (table 6 and 8 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/527/A77/diskless?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/527/A77/diskless?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/527/A77/diskless?GETtext/xml+votable180.050000true80.68332333.440710.0055555555555555566/1285 1287 1296 12982.0616683193919197e-20 3.921900021377621e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/527/A77?format=asciiOpticalInfraredRadiodefaultJ/A+A/527/A77/clas0-2VRI H-alpha and infrared magnitudes of Class 0/I/II candidate members (table 5 and 7 of the paper)RAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSequential numbermeta.recordintXID? Designation from Caramazza et al. (2011, in prep.)meta.idintnullablePapIDetails from PaperI (Caramazza et al. 2008, Cat. J/A+A/488/211)meta.ref.urlcharVmag? Landolt V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? Error of the Landolt V magnitudemagstat.error;phot.mag;em.opt.VfloatnullableRmag? Landolt R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? Error of the Landolt R magnitudemagstat.error;phot.mag;em.opt.RfloatnullableIcmag? Cousins I magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag? Error of the Cousins I magnitudemagstat.error;phot.mag;em.opt.IfloatnullableHamag? H-{alpha} magnitudemagphot.flux;em.line.HalphafloatnullableJmag? TNG/NICS Js magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? TNG/NICS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? TNG/NICS K' magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in Kmagmagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]? Magnitude at 3.6ummagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Error in [3.6] magnitudemagstat.errorfloatnullable[4.5]? Magnitude at 4.5ummagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Error in [4.5] magnitudemagstat.errorfloatnullable[5.8]? Magnitude at 5.8ummagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Error in [5.8] magnitudemagstat.errorfloatnullable[8.0]? Magnitude at 8.0ummagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Error in [8.0] magnitudemagstat.errorfloatnullableJ/A+A/527/A77/disklessVRI H-alpha and infrared magnitudes of diskless candidate members (table 6 and 8 of the paper)e_Jmag? Error in Jmagmagstat.error;phot.mag;em.IR.JfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSequential numbermeta.recordintXID? Designation from Caramazza et al. (2011, in prep.)meta.idintnullablePapIDetails from PaperI (Caramazza et al. 2008, Cat. J/A+A/488/211)meta.ref.urlcharVmag? Landolt V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? Error of the Landolt V magnitudemagstat.error;phot.mag;em.opt.VfloatnullableRmag? Landolt R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? Error of the Landolt R magnitudemagstat.error;phot.mag;em.opt.RfloatnullableIcmag? Cousins I magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag? Error of the Cousins I magnitudemagstat.error;phot.mag;em.opt.IfloatnullableHamag? H-{alpha} magnitudemagphot.flux;em.line.HalphafloatnullableJmag? TNG/NICS Js magnitudemagphot.mag;em.IR.JfloatnullableHmag? TNG/NICS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? TNG/NICS K' magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in Kmagmagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]? Magnitude at 3.6ummagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Error in [3.6] magnitudemagstat.errorfloatnullable[4.5]? Magnitude at 4.5ummagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Error in [4.5] magnitudemagstat.errorfloatnullable[5.8]? Magnitude at 5.8ummagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Error in [5.8] magnitudemagstat.errorfloatnullable[8.0]? Magnitude at 8.0ummagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Error in [8.0] magnitudemagstat.errorfloatnullableRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.main