J/AZh/94/648ivo://CDS.VizieR/J/AZh/94/648CDSSmimova K.I.Murga M.S.Wiebe D.S.Sobolev A.M.2017-10-24T09:51:09Z2017-10-13T15:21:43ZCDS support team

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

cds-question@unistra.frgalaxiesco-line-emissionh-i-line-emissionThe relationships between atomic and molecular hydrogen and dust of various sizes in extragalactic star-forming regions are considered, based on observational data from the Spitzer and Herschel infrared space telescopes, the Very Large Array (atomic hydrogen emission) and IRAM (CO emission). The source sample consists of approximately 300 star-forming regions in 11 nearby galaxies. Aperture photometry has been applied to measure the fluxes in eight infrared bands (3.6, 4.5, 5.8, 8, 24, 70, 100, and 160um), the atomic hydrogen 21 cm line, and CO (2-1) line. The parameters of the dust in the starforming regions were determined via synthetic-spectra fitting, such as the total dust mass, the fraction of polycyclic aromatic hydrocarbons (PAHs), etc. Comparison of the observed fluxes with the measured parameters shows that the relationships between atomic hydrogen, molecular hydrogen, and dust are different in low- and high-metallicity regions. Low-metallicity regions contain more atomic gas, but less molecular gas and dust, including PAHs. The mass of dust constitutes about 1% of the mass of molecular gas in all regions considered. Fluxes produced by atomic and molecular gas do not correlate with the parameters of the stellar radiation, whereas the dust fluxes grow with increasing mean intensity of stellar radiation and the fraction of enhanced stellar radiation. The ratio of the fluxes at 8 and 24um, which characterizes the PAH content, decreases with increasing intensity of the stellar radiation, possibly indicating evolutionary variations of the PAH content. The results confirm that the contribution of the 24um emission to the total IR luminosity of extragalactic star-forming regions does not depend on the metallicity.2017ARep...61..646Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AZh/94/648CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AZh/94/648https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AZh/94/648http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AZh/94/648https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AZh/94/648https://vizier.iucaa.in/viz-bin/votable?-source=J/AZh/94/648http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AZh/94/648GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AZh/94/648/galaxies (Data on the studied galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AZh/94/648/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/AZh/94/648/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AZh/94/648/galaxies?GETtext/xml+votable180.050000true24.173945815.78366190.005555555555555556Cone search capability for table J/AZh/94/648/photom (Photometry results for the 10 galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AZh/94/648/photom?https://vizier.iucaa.in/viz-bin/conesearch/J/AZh/94/648/photom?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AZh/94/648/photom?GETtext/xml+votable180.050000true308.7401560.2126750.0055555555555555566/2320 7602 7624 7799 10841 10856 15592 15593 18398 27514 28149 281671.2415266230347566e-21 5.517906024225661e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AZh/94/648?format=asciiRadiodefaultJ/AZh/94/648/galaxiesData on the studied galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDistDistanceMpcpos.distancefloatr_DistDistance reference (1)meta.ref;pos.framecharMTypeMorphological typesrc.morph.typecharAbdAbundance, 12+log(O/H)phys.abundfloatN1Number of selected regionsmeta.numberintN2Number of regions where we could determine the dust parameters by means of fitting their spectrameta.numberintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AZh/94/648/photomPhotometry results for the 10 galaxiesGalGalaxy namemeta.id;meta.mainchare_F100? rms uncertainty on F100mJystat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar-forming region sequential number within the galaxymeta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRRadiusarcsecphys.angSizefloatF3.6? Flux at 3.6ummJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? rms uncertainty on F3.6mJystat.errorfloatnullableF4.5? Flux at 4.5ummJyphot.mag;em.IR.4-8umfloatnullablee_F4.5? rms uncertainty on F4.5mJystat.errorfloatnullableF5.8? Flux at 5.8ummJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8? rms uncertainty on F5.8mJystat.errorfloatnullableF8.0? Flux at 8.0ummJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0? rms uncertainty on F8.0mJystat.errorfloatnullableF8.0afe? Flux at 8.0um only from PAHmJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0afe? rms uncertainty on Fafe8.0mJystat.errorfloatnullableF24? Flux on 24ummJyphot.flux.density;em.IR.15-30umfloatnullablee_F24? rms uncertainty on F24mJystat.errorfloatnullableF24ns? Flux on 24um only from very small grains (VSG)mJyphot.flux.density;em.IR.15-30umfloatnullablee_F24ns? rms uncertainty on F24nsmJystat.errorfloatnullableF70? Flux at 70ummJyphot.flux.density;em.IR.30-60umfloatnullablee_F70? rms uncertainty on F70mJystat.errorfloatnullableF100? Flux at 100ummJyphot.flux.density;em.IR.60-100umdoublenullableF160? Flux at 160ummJyphot.flux.density;em.mm.1500-3000GHzdoublenullablee_F160? rms uncertainty on F160mJystat.errorfloatnullableFCO? CO fluxJy.km/sphot.flux.density;em.line.CO;spect.linefloatnullablee_FCO? rms uncertainty on FCOJy.km/sstat.errorfloatnullableFHI? HI fluxJy.km/sphot.flux.density;em.line.HI;spect.linefloatnullablee_FHI? rms uncertainty on FHIJy.km/sstat.errorfloatnullable