J/A+A/493/785ivo://CDS.VizieR/J/A+A/493/785doi:10.26093/cds/vizier.34930785CDSGanesh S.Omont A.Joshi U.C.Baliyan K.S.Schultheis M.Schuller F.,Simon G.2009-04-03T22:30:12Z2009-04-03T22:24:22ZCDS support team

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

cds-question@unistra.frinfrared-sourcesgiant-starsinfrared-photometryWe identify the stellar populations (mostly red giants and young stars) detected in the ISOGAL survey at 7 and 15um towards a field (LN45) in the direction l=-45, b=0.0. The sources detected in the survey of the Galactic plane by the Infrared Space Observatory were characterised based on colour-colour and colour-magnitude diagrams. We combine the ISOGAL catalogue with the data from surveys such as 2MASS and GLIMPSE. Interstellar extinction and distance were estimated using the red clump stars detected by 2MASS in combination with the isochrones for the AGB/RGB branch. Absolute magnitudes were thus derived and the stellar populations identified from their absolute magnitudes and their infrared excess. A standard approach to analysing the ISOGAL disc observations has been established. We identify several hundred RGB/AGB stars and 22 candidate young stellar objects in the direction of this field in an area of 0.16deg^2^. An overdensity of stellar sources is found at distances corresponding to the distance of the Scutum-Crux spiral arm. In addition, we determined mass-loss rates of AGB-stars using dust radiative transfer models from the literature.2009A&A...493..785Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/493/785CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/243 : The ISOGAL Point Source Catalogue - IGPSC (Omont+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/493/785https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/493/785http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/493/785https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/493/785https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/493/785http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/493/785GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/493/785/tableb1 (Positions, magnitudes, distance, extinction..)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/493/785/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/493/785/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/493/785/tableb1?GETtext/xml+votable180.050000true217.53822194-60.061018060.0055555555555555566/41768 41770-417717.947616174868663e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/493/785?format=asciiInfrareddefaultJ/A+A/493/785/tableb1Positions, magnitudes, distance, extinction..recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/746] Sequential number (1)meta.recordintISOGAL-PStandard identification (JHHMMSS.s+DDMMSS) (2)meta.id;meta.maincharImagd? DENIS I magnitude (4)magphot.mag;em.opt.IfloatnullableJmagd? DENIS J magnitude (4)magphot.mag;em.IR.JfloatnullableKmagd? DENIS K_s magnitude (4)magphot.mag;em.IR.Kfloatnullablemag7? ISOGAL LW2 magnitude (7micron) (4)magphot.flux.density;em.IR.4-8umfloatnullablemag15? ISOGAL LW3 magnitude (15micron) (4)magphot.flux.density;em.IR.8-15umfloatnullableJmag2? 2MASS J magnitude (5)magphot.mag;em.IR.JfloatnullableHmag2? 2MASS H magnitude (5)magphot.mag;em.IR.HfloatnullableKmag2? 2MASS K magnitude (5)magphot.mag;em.IR.KfloatnullableIRAC1? GLIMPSE IRAC1 3.6um magnitude (6)magphot.flux.density;em.IR.3-4umfloatnullableIRAC2? GLIMPSE IRAC2 4.5um magnitude (6)magphot.mag;em.IR.4-8umfloatnullableIRAC3? GLIMPSE IRAC3 5.8um magnitude (6)magphot.flux.density;em.IR.4-8umfloatnullableIRAC4? GLIMPSE IRAC4 8.0um magnitude (6)magphot.flux.density;em.IR.8-15umfloatnullableB1? MSX B1 (4.29um) flux density (7)Jyphot.mag;em.IR.4-8umdoublenullableB2? MSX B2 (4.35um) flux density (7)Jyphot.mag;em.IR.4-8umdoublenullableA? MSX A (8.28um) flux density (7)Jyphot.flux.density;em.IR.8-15umdoublenullableC? MSX C (12.13um) flux density (7)Jyphot.flux.density;em.IR.8-15umdoublenullableD? MSX D (14.65um) flux density (7)Jyphot.flux.density;em.IR.8-15umdoublenullableE? MSX E (21.34um) flux density (7)Jyphot.flux.density;em.IR.15-30umdoublenullableFlag[0/9] ISOGAL-GLIMPSE association flag (8)meta.code.errorintTypeStellar population type (RG/AGB/YSOc/PNe etc)src.classcharDist? Photometric distancepcpos.distance;pos.heliocentricfloatnullableAV? Extinction in visual magnitudemagphys.absorption;em.opt.VfloatnullableKMAG? Absolute K magnitudemagphys.magAbs;em.IR.KfloatnullablelogdM/dt? Mass loss ratelog(solMass.yr**-1)phys.mass.lossfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharMSXDisplay the MSX6C data (Egan et al. 2003, Cat. V/114)meta.ref.urlcharRAJ2000Right Ascension (J2000) (3)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (3)degpos.eq.dec;meta.main