J/other/RMxAA/45ivo://CDS.VizieR/J/other/RMxAA/45.261CDSFlores-Fajardo N.Morisset C.Binette L.2017-10-18T08:23:56Z2009-10-28T21:19:56ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyh-ii-regionsinterstellar-mediumStudies of the Diffuse Ionized Gas (DIG) have progressed without providing so far any strict criterion to distinguish DIGs from HII regions. In this work, we compile the emission line measurements of 29 galaxies that are available in the scientific literature, thereby setting up the first DIG database DIGEDA. Making use of this database, we proceeded to analyze global properties of the DIG using the [NII]6583/Halpha, [OI]6300/Halpha, [OIII]5007/Hbeta and [SII]6716/Halpha lines ratios, including the Halpha emission measure. This analysis leads us to conclude that the [NII]/Halpha ratio provides an objective criterion for distinguishing whether an emission region is DIG or an HII region, while the EM(Halpha) is a useful quantity only when the galaxies are considered individually. Finally, we find that the emission regions of Irr galaxies classified as DIG in the literature appear in fact to be much more similar to HII regions than to the DIGs of spiral galaxies.2009RMxAA..45..261Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RMxAA/45.261CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/165/307 : Ionization in neutral gas galaxies survey. I. (Meurer+, 2006)J/ApJ/661/801 : Ionization in neutral gas galaxies survey. III. (Oey+ 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RMxAA/45.261https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RMxAA/45.261http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RMxAA/45.261https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RMxAA/45.261https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RMxAA/45.261http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RMxAA/45.261GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RMxAA/45.261/galaxies (List of galaxies in DIGEDA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RMxAA/45.261/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RMxAA/45.261/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RMxAA/45.261/galaxies?GETtext/xml+votable180.050000true10.68458341.2691670.0055555555555555566/137 2155 2409 2709 3389 3583 5469 6604 7424 7584 7606 7743 7769 8225 10761 10979 11027 11434 11492 27246 27773 27861 27926 27941 28184 28535 31321 34260 35214https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RMxAA/45.261?format=asciiOpticaldefaultJ/other/RMxAA/45.261/galaxiesList of galaxies in DIGEDArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalIDInteger number that relates uniquely the galaxy's name to its source catalog (1)meta.idintprimaryGalaxyThe NED catalog name of each galaxy in DIGEDAmeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainMTypeGalaxy morphology in NED catalogmeta.idchari? The inclination angle for each galaxydegpos.posAngfloatnullableSimbadSimbad column added by the CDScharNEDSimbad column added by the CDScharJ/other/RMxAA/45.261/digedaDIG and HII regions spectroscopic observations databaseI4363? OIII 4363 line intensity (2)spect.line.intensityfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDPositive, consecutive and unique number for row identificationmeta.idintPosValue of the observation position in each galaxy (1)pcpos.distancedoubleI3727? OII 3727 line intensity (2)spect.line.intensityfloatnullableIHb? Hbeta 4861 line intensity (2)spect.line.intensityfloatnullableI4959? OIII 4959 line intensity (2)spect.line.intensityfloatnullableI5007? OIII 5007 line intensity (2)spect.line.intensityfloatnullableI5876? HeI 5876 line intensity (2)spect.line.intensityfloatnullableI6300? OI 6300 line intensity (2)spect.line.intensityfloatnullableI6548? NII 6548 line intensity (2)spect.line.intensityfloatnullableIHa? Halpha 6563 line intensity (2)spect.line.intensityfloatnullableI6583? NII 6583 line intensity (2)spect.line.intensityfloatnullableI6716? SII 6716 line intensity (2)spect.line.intensityfloatnullableI6731? SII 6731 line intensity (2)spect.line.intensityfloatnullableI16+31? SII 6716+6731 line intensity (2)spect.line.intensityfloatnullableTe? Electronic temperature10000Kphys.temperaturefloatnullableR16/31? SII 6716/6731 ratiospect.line.intensity;arith.ratiofloatnullableR07/59? OIII 5007/4959 ratiospect.line.intensity;arith.ratiofloatnullableRHa/Hb? Observational or theoretical Halpha/Hbeta ratio (3)spect.line.intensity;arith.ratiofloatnullableEM(Ha)? The Halpha Emission Measurepc.cm**-6phys.emissMeasuredoublenullableRefID[1/18] Bibliographical reference, in refs.dat filespect.line.intensity;arith.ratiointMTypeGalaxy morphology and orientation (5)src.morphintSlit[1/3] Slit orientation with respect to the galactic plane (6)meta.codeintRegionRefers to the three possible emission region types (7)meta.codeintGalIDGalaxy sequential number as in galaxy.dat filemeta.recordintRefNInteger number pointing to the corresponding entry in the refsid.dat filespect.line.intensity;arith.ratiointJ/other/RMxAA/45.261/refsidBibliographical references used for the compilation of DIGEDArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefIDUnique identification number for each reference, as in refs.dat filemeta.ref;pos.frameintBibCodeAssociated bibliographical reference used to performed DIGEDAinstr.setupcharRefNInteger number that relates uniquely each entry of this tablemeta.idintGalaxyName of the galaxies studied in each referencemeta.id;meta.maincharRegionSlit orientation respect to the galactic plane in the case of edge-on galaxies, or the region type in face-on galaxies case (1)meta.codecharI3727[0/1] OII 3727 line observed (2)meta.codeintI4959[0/1] OIII 4959 line observed (2)meta.codeintI5007[0/1] OIII 5007 line observed (2)meta.codeintI5876[0/1] HeI 5876 line observed (2)meta.codeintI6300[0/1] OI 6300 line observed (2)meta.codeintI6583[0/1] NII 6583 line observed (2)meta.codeintI6716[0/1] SII 6716 line observed (2)meta.codeintI16+31[0/1] SII 6716+6731 line observed (2)meta.codeintEM(Ha)[0/1] The Halpha Emission Measure flag (2)meta.code.errorintNoRegTotal number of areas or positions observed within each galaxymeta.numberintJ/other/RMxAA/45.261/refsReferencesComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar