J/MNRAS/446/2823ivo://CDS.VizieR/J/MNRAS/446/2823doi:10.26093/cds/vizier.74462823CDSRiffel R.A.Ho L.C.Mason R.Rodriguez-Ardila A.Martins L.Riffel R.,Diaz R.Colina L.Alonso-herrero A.Flohic H.Gonzalez Martin O.,Lira P.McDermid R.Ramos Almeida C.Schiavon R.Thanjavur K.,Ruschel-Dutra D.Winge C.Perlman E.2024-08-14T20:18:56Z2015-11-09T11:17:20ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsgalaxy-kinematicsspectroscopyWe examine the stellar velocity dispersions ({sigma}) of a sample of 48 galaxies, 35 of which are spirals, from the Palomar nearby galaxy survey. It is known that for ultra-luminous infrared galaxies (ULIRGs) and merger remnants, the {sigma} derived from the near-infrared CO band heads is smaller than that measured from optical lines, while no discrepancy between these measurements is found for early-type galaxies. No such studies are available for spiral galaxies - the subject of this paper. We used cross-dispersed spectroscopic data obtained with the Gemini Near-Infrared Spectrograph, with spectral coverage from 0.85 to 2.5{mu}m, to obtain {sigma} measurements from the 2.29{mu}m CO band heads ({sigma}CO) and the 0.85{mu}m calcium triplet ({sigma}_CaT_). For the spiral galaxies in the sample, we found that {sigma}_CO_ is smaller than {sigma}_CaT_, with a mean fractional difference of 14.3 per cent. The best fit to the data is given by {sigma}_opt_=(46.0+/-18.1)+(0.85+/-0.12){sigma}_CO_. This '{sigma}-discrepancy' may be related to the presence of warm dust, as suggested by a slight correlation between the discrepancy and the infrared luminosity. This is consistent with studies that have found no {sigma}-discrepancy in dust-poor early-type galaxies, and a much larger discrepancy in dusty merger remnants and ULIRGs. That {sigma}_CO_ is lower than {sigma}opt may also indicate the presence of a dynamically cold stellar population component. This would agree with the spatial correspondence between low-{sigma}_CO_ and young/intermediate-age stellar populations that has been observed in spatially resolved spectroscopy of a handful of galaxies.2015MNRAS.446.2823Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/2823CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/98/477 : Optical spectral atlas of Seyfert nuclei (Ho+ 1995)J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/2823https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/2823http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/2823https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/2823https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/2823http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/2823GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/2823/table1 (Properties of the galaxies from our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/2823/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/2823/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/2823/table1?GETtext/xml+votable180.050000true10.091979241.68530.0055555555555555566/975 2214 2230 2282 2564 2709 3446 4447 4990 5975-5976 7132 7214 7385 7424 7606 7659 8085 8196 10475 10637 10817 10856 10977 10980 11027 12005 13489 13522 18209 18387 19611 23075 25083 27426 27721 27767 27914 27937 27942 28039 28123 28141 28221 28538 31998 36785https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/2823?format=asciiOpticaldefaultJ/MNRAS/446/2823/table1Properties of the galaxies from our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id;meta.maincharprimaryn_Gal[b] Note on Gal (1)meta.notecharHTypeHubble type from Ho et al. (1997, Cat. J/ApJS/112/315)meta.note;src.morph.typecharNActNuclear Activity from Ho et al. (1997, Cat. J/ApJS/112/315) (2)meta.code.classcharsigmaCOCO derived velocity dispersionkm/sphys.veloc.dispersion;spect.linefloate_sigmaCOrms uncertainty on sigmaCOkm/sstat.errorfloatn_sigmaCO[a] Note on sigmaCO (1)meta.notecharsigmaCaT? CaT derived velocity dispersion (3)km/sphys.veloc.dispersionfloatnullablee_sigmaCaT? rms uncertainty on sigmaCaTkm/sstat.errorfloatnullablen_sigmaCaT[a] Note on sigmaCaT (1)meta.notecharh3COStellar kinematic parameter h3 derived from COstat.fit.paramfloate_h3COrms uncertainty on h3CO (4)stat.errorfloath3CaT? Stellar kinematic parameter h3 derived from CaT (3)stat.fit.paramfloatnullablee_h3CaT? rms uncertainty on h3CaT (4)stat.errorfloatnullableh4COStellar kinematic parameter h4 derived from COstat.fit.paramfloate_h4COrms uncertainty on h4CO (4)stat.errorfloath4CaT? Stellar kinematic parameter h4 derived from CaT (3)stat.fit.paramfloatnullablee_h4CaT? rms uncertainty on h4CaT (4)stat.errorfloatnullableConf[ab] Instrumental configuration used for the observations (5)instr.setupcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/446/2823/tableb1Stellar templates used for each galaxy to derive the stellar kinematicsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id.parentcharSpType1CaT region spectral typesrc.spType;obs.fieldcharStar1CaT region star name (1)meta.id;meta.maincharW1? CaT region weight (1)%stat.weightintnullableSpType2CO region spectral typesrc.spType;obs.fieldcharStar2CO region star name (2)meta.idcharW2? CO region weight (2)%phys.atmol.weightintnullable