J/MNRAS/381/1219ivo://CDS.VizieR/J/MNRAS/381/1219doi:10.26093/cds/vizier.73811219CDSOjha D.K.Tej A.Schultheis M.Omont A.Schuller F.2024-07-05T20:15:32Z2008-01-15T21:47:34ZCDS support team

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

cds-question@unistra.frinfrared-sourcesinfrared-photometryWe present a study of MSX point sources in the Galactic bulge (|l|<3deg, 1deg<|b|<5deg), observed in the A, C, D and E bands (8-21um), with a total area 48 square degrees and more than 7000 detected sources in the MSX D band (15 micron). We discuss the nature of the MSX sources [mostly asymptotic giant branch (AGB) stars], their luminosities, the interstellar extinction, the mass-loss rate distribution and the total mass-loss rate in the bulge. The mid-infrared data of MSX point sources have been combined with the near-infrared (J, H and Ks) data of Two Micron All Sky Survey. The cross-identification was restricted to Ks-band detected sources with Ks<=11mag. However, for those bright MSX D-band sources ([D]<4.0mag), which do not satisfy this criterion, we have set no Ks-band magnitude cut-off. The bolometric magnitudes and the corresponding luminosities of the MSX sources were derived by fitting blackbody curves. The relation between dM/dt and (Ks-[15])0 was used to derive the mass-loss rate of each MSX source in the bulge fields. Except for very few post-AGB stars, planetary nebulae and OH/IR stars, a large fraction of the detected sources at 15 micron (MSX D band) are AGB stars well above the red giant branch tip. A number of them show an excess in ([A]-[D])0 and (Ks-[D])0 colours, characteristic of mass-loss. These colours, especially (Ks-[D])0, enable estimation of the mass-loss rates (dM/dt) of the sources in the bulge fields which range from 10^-7^ to 10^-4^M_{sun}_/yr. Taking into consideration the completeness of the mass-loss rate bins, we find that the contribution to the integrated mass-loss is probably dominated by mass-loss rates larger than 3x10^-7^M_{sun}_/yr and is about 1.96x10^-4^M_{sun}_/yr/deg^2^ in the `intermediate' and `outer' bulge fields of sources with mass-loss rates, dM/dt>3x10^-7^M_{sun}_/yr. The corresponding integrated mass-loss rate per unit stellar mass is 0.48x10^-11^/yr. Apart from this, the various mid- and near-infrared colour-colour and colour-magnitude diagrams are discussed in the paper to study the nature of the stellar population in the MSX bulge fields.2007MNRAS.381.1219Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/381/1219CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/243 : The ISOGAL Point Source Catalogue - IGPSC (Omont+ 2003)B/denis : The DENIS database (DENIS Consortium, 2005)J/AJ/122/1844 : MSX and 2MASS cross-correlation in LMC (Egan+, 2001)J/A+A/405/531 : IR spec. of ISOGAL Galactic Bulge sources (Schultheis+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/381/1219https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/381/1219http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/381/1219https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/381/1219https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/381/1219http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/381/1219GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/381/1219/table2 (Catalogue of MSX-2MASS sources in the bulge fields with their DENIS & ISOGAL counterparts.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/381/1219/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/381/1219/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/381/1219/table2?GETtext/xml+votable180.050000true260.1362-28.83750.0055555555555555564/1803 5/7182-7183 7194 7204-7205 7209 7211 7216 6/28722-28723 28726-28727 28780 28782 28805 28807 28815 28825 28828-28829 28843 28868 28870 28872-28873 28896 28898 28904 28906 29188-29189 29200-29201 29204-29205 292486.6794754322138496e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/381/1219?format=asciiInfrareddefaultJ/MNRAS/381/1219/table1The detailed characteristics of the MSX bulge subfieldsFieldMSX bulge subfieldsobs.fieldcharN2MASSNumber of 2MASS sources (Ks<=11.0mag)meta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDens1MSX source density at D-band (per square deg)deg**2src.densityintAVMean interstellar extinctionmagphys.absorption;stat.meanfloate_AVSigma in interstellar extinctionmagstat.errorfloatNFrgdNumber of "Foreground" sourcesmeta.numberintNBNumber of "B" sourcesmeta.numberintcenterCenter of the field (galactic position)obs.fieldcharsizeSize of the fieldphys.angSizecharStarSimbad column added by the CDSmeta.ref.urlcharCMDColor-magnitude diagram with data from 2MASS (Cat. II/246)meta.ref.urlcharJ/MNRAS/381/1219/table2Catalogue of MSX-2MASS sources in the bulge fields with their DENIS & ISOGAL counterparts.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSource numbermeta.id;meta.mainintMSimbad column added by the CDSmeta.ref.urlcharMSXMSX6C designation (GLLL.llll-bb.bbbb)meta.id;meta.maincharprimaryRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmag? 2MASS J magnitude (G1)magphot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitude (G1)magphot.mag;em.IR.HfloatnullableKmag? 2MASS Ks magnitude (G1)magphot.mag;em.IR.KfloatnullableKmag2? DENIS Ks magnitude (G1)magphot.mag;em.IR.KfloatnullableAmag? MSX A band (8.3um) magnitude (G1)magphot.flux.density;em.IR.8-15umfloatnullableCmag? MSX C band (12.1um) magnitude (G1)magphot.flux.density;em.IR.8-15umfloatnullableDmag? MSX D band (14.7um) magnitude (G1)magphot.flux.density;em.IR.8-15umfloatnullableEmag? MSX E band (21.3um) magnitude (G1)magphot.flux.density;em.IR.15-30umfloatnullable[7]mag? ISOGAL magnitude at 7 micron (G1)magphot.flux.density;em.IR.4-8umfloatnullable[15]mag? ISOGAL magnitude at 15 micron (G1)magphot.flux.density;em.IR.8-15umfloatnullableAVInterstellar extinctionmagphys.absorptionfloat2MASSDisplay the 2MASS and DENIS datameta.ref.urlcharJ/MNRAS/381/1219/table3Sub-sample of MSX-2MASS sources from table2.dat with AV, mass-loss rate & luminosity valuesLum? Luminositylog(solLum)phys.luminositydoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX6C designation (GLLL.llll-bb.bbbb)meta.id;meta.maincharIRASIRAS Namemeta.idcharAmagMSX A band magnitudemagphot.flux.density;em.IR.8-15umfloatDmagMSX D band magnitudemagphot.flux.density;em.IR.8-15umfloatFC? MSX C band flux (1)Jyphot.flux.density;em.IR.8-15umfloatnullableFE? MSX E band flux (1)Jyphot.flux.density;em.IR.15-30umfloatnullableF12um? IRAS flux at 12 micron (1)Jyphot.flux.density;em.IR.8-15umfloatnullableF25um? IRAS flux at 25 micron (1)Jyphot.flux.density;em.IR.15-30umfloatnullableAVInterstellar extinction (in mag)magphys.absorptionfloatdM/dtMass-loss ratesolMass/yrarith.ratedouble