J/A+A/453/535ivo://CDS.VizieR/J/A+A/453/535doi:10.26093/cds/vizier.34530535CDSSchuller F.Omont A.Glass I.S.Schultheis M.Egan M.P.Price S.D.2014-10-21T07:26:17Z2007-01-02T21:41:22ZCDS support team

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

cds-question@unistra.frContext: The stellar populations in the central region of the Galaxy are poorly known because of the high visual extinction and very great source density in this direction. Aims: To use recent infrared surveys for studying the dusty stellar objects in this region. Methods: We analyse the content of a ~20x20arcmin^2 field centred at (l,b)=(-0.27,-0.06) observed at 7 and 15 microns as part of the ISOGAL survey. These ISO observations are more than an order of magnitude better in sensitivity and spatial resolution than the IRAS observations. The sources are cross-associated with other catalogues to identify various types of objects. We then derive criteria to distinguish young objects from post-main sequence stars. Results: We find that a sample of about 50 young stellar objects and ultra-compact HII regions emerges, out of a population of evolved AGB stars. We demonstrate that the sources colours and spatial extents, as they appear in the ISOGAL catalogue, possibly complemented with MSX photometry at 21 microns, can be used to determine whether the ISOGAL sources brighter than 300mJy at 15 microns (or [15]<4.5mag) are young objects or late-type evolved stars.2006A&A...453..535Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/453/535CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/243 : The ISOGAL Point Source Catalogue - IGPSC (Omont+ 2003)V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)B/denis : The DENIS database (DENIS Consortium, 2005)II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/453/535https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/453/535http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/453/535https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/453/535https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/453/535http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/453/535GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/453/535/tablea1 (Magnitudes of the selected candidate young objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/453/535/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/453/535/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/453/535/tablea1?GETtext/xml+votable180.050000true266.140833-29.2319440.0055555555555555566/28827 288301.6558465556080236e-21 2.689546822829005e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/453/535?format=asciiInfrareddefaultJ/A+A/453/535/tablea1Magnitudes of the selected candidate young objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintISOGAL-PJName (ISOGAL-P Jhhmmss.s+ddmmss)meta.id;meta.maincharJ2mag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableH2mag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableK2mag? 2MASS K magnitudemagphot.mag;em.IR.Kfloatnullableq_J2mag2MASS flag (1)meta.code.qualcharq_H2mag2MASS flag (1)meta.code.qualcharq_K2mag2MASS flag (1)meta.code.qualchard2MASSISO-2MASS separationarcsecpos.angDistancefloatImag? DENIS I magnitudemagphot.mag;em.opt.IfloatnullableJmag? DENIS J magnitudemagphot.mag;em.IR.JfloatnullableKmag? DENIS K magnitudemagphot.mag;em.IR.KfloatnullabledDENIS? ISO-DENIS separationarcsecpos.angDistancefloatnullableS7umISO 7 microns flux density (PSF fit)Jyphot.flux.density;em.IR.4-8umfloatS15umISO 15 microns flux density (PSF fit)Jyphot.flux.density;em.IR.8-15umfloatS15umapISO 15 microns flux density (aperture)Jyphot.flux.density;em.IR.8-15umfloate_S15umUncertainty on ISO 15 microns flux densityJystat.errorfloatq_S7umISOGAL quality flag (2)meta.code.qualintq_S15umISOGAL quality flag (2)meta.code.qualintd7-15um? 7-15 microns separationarcsecpos.angDistancefloatnullableMSXMSX6C source namemeta.idcharSMSXA? MSX A-band flux densityJyphot.flux.densityfloatnullableSMSXC? MSX C-band flux densityJyphot.flux.densityfloatnullableSMSXD? MSX D-band flux densityJyphot.flux.densityfloatnullableSMSXE? MSX E-band flux densityJyphot.flux.densityfloatnullableq_SMSXA? MSX quality flag (3)meta.code.qualintnullableq_SMSXC? MSX quality flag (3)meta.code.qualintnullableq_SMSXD? MSX quality flag (3)meta.code.qualintnullableq_SMSXE? MSX quality flag (3)meta.code.qualintnullabledMSX? ISO-MSX separationarcsecpos.angDistancefloatnullableIRASIRAS source namemeta.idcharS12um? IRAS 12 microns flux densityJyphot.flux.density;em.IR.8-15umfloatnullableS25um? IRAS 25 microns flux densityJyphot.flux.density;em.IR.15-30umintnullableS60um? IRAS 60 microns flux densityJyphot.flux.density;em.IR.30-60umintnullableS100um? IRAS 100 microns flux densityJyphot.flux.density;em.IR.60-100umintnullableq_S12um? IRAS quality flag (4)meta.code.qualintnullableq_S25um? IRAS quality flag (4)meta.code.qualintnullableq_S60um? IRAS quality flag (4)meta.code.qualintnullableq_S100um? IRAS quality flag (4)meta.code.qualintnullable2MASSLink to 2MASS datameta.ref.urlcharDENISLink to DENIS datameta.ref.urlchar_RARight ascension (derived from ISOGAL-PJ) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from ISOGAL-PJ) for Eq=J2000degpos.eq.dec;meta.main