J/ApJ/808/42ivo://CDS.VizieR/J/ApJ/808/42doi:10.26093/cds/vizier.18080042CDSCroxall K.V.Pogge R.W.Berg D.A.Skillman E.D.Moustakas J.2024-11-18T20:10:42Z2015-12-11T14:13:01ZCDS support team

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

cds-question@unistra.frchemical-abundancesgalaxiesspectroscopyWe have observed NGC 5194 (M51a) as part of the CHemical Abundances of Spirals project (CHAOS). Using the Multi Object Double Spectrographs on the Large Binocular Telescope we are able to measure one or more of the temperature-sensitive auroral lines ([OIII]{lambda}4363, [NII]{lambda}5755, [SIII]{lambda}6312) and thus measure "direct" gas-phase abundances in 29 individual HII regions. [OIII]{lambda}4363 is only detected in two HII regions, both of which show indications of excitation by shocks. We compare our data to previous direct abundances measured in NGC 5194 and find excellent agreement ({Delta}[log(O/H)]~0.05) for all but one region. We find no evidence of trends in Ar/O, Ne/O, or S/O within NGC 5194 or compared to other galaxies. We find modest negative gradients in both O/H and N/O with very little scatter ({sigma}<=0.08dex), most of which can be attributed to random error and not to intrinsic dispersion. The gas-phase abundance gradient is consistent with the gradients observed in other interacting galaxies, which tend to be shallower than gradients measured in isolated galaxies. The N/O ratio (<log(N/O)>=-0.62) suggests secondary nitrogen production is responsible for a significantly larger fraction of nitrogen (e.g., factor of 8-10), relative to primary production mechanisms than predicted by theoretical models.2015ApJ...808...42Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/808/42CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/806/16 : CHemical Abundances of Spirals (CHAOS) I. NGC628 (Berg+, 2015)J/MNRAS/424/2316 : Abundances in HII regions (Pilyugin+, 2012)J/ApJ/735/75 : HST observations of HII regions in M51 (Lee+, 2011)J/ApJS/190/233 : Spectroscopy & abundances of SINGS galaxies (Moustakas+, 2010)J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)J/ApJ/700/654 : Keck spectroscopy of extragalactic HII regions (Esteban+ 2009)J/ApJ/695/580 : Oxygen abundance in M83 (Bresolin+, 2009)J/AJ/136/2563 : HI Nearby Galaxy Survey, THINGS (Walter+, 2008)J/ApJ/675/1213 : Abundances in M33 HII regions (Rosolowsky+, 2008)J/AJ/133/2559 : Compact radio sources in spiral galaxies. II. (Maddox+, 2007)J/A+A/441/981 : HII regions in 5 spiral galaxies (Bresolin+, 2005)J/ApJ/617/240 : Oxygen abundances in the GOODS-North field (Kobulnicky+, 2004)J/AJ/126/2867 : Red supergiants in Magellanic Clouds (Massey+, 2003)J/ApJ/424/599 : Abundances in barred spiral galaxies (Martin+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/808/42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/808/42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/808/42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/808/42https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/808/42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/808/42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/808/42/obs (NGC 5194 MODS/LBT observations and equivalent widths (tables 2 and 3b))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/808/42/obs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/808/42/obs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/808/42/obs?GETtext/xml+votable180.050000true202.47083347.1978060.0055555555555555566/11026-11027https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/808/42?format=asciidefaultJ/ApJ/808/42/obsNGC 5194 MODS/LBT observations and equivalent widths (tables 2 and 3b)SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIIidHII Region (NGC5194 +/-offsets in RA/DE) (1)meta.id;meta.maincharprimaryAlink to abundancesmeta.ref.urlcharRAJ2000[13] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[47] Degree of Declination (J2000)pos.eq.dec;meta.mainRgarcDeprojected HII distance from galaxy centerarcsecpos.distancefloatRgR25Deprojected HII distance from galaxy center (2)pos.distancefloatRgkpcDeprojected HII distance from galaxy centerkpcpos.distancefloatdOIII[0,1] 3{sigma} [OIII] 4363A detectionmeta.codeintdNII[0,1] 3{sigma} [NII] 5755A detectionmeta.codeintdSIII[0,1] 3{sigma} [SIII] 6312A detectionmeta.codeintdOII[0,1] 3{sigma} [OII] 7330A detectionmeta.codeintdSII[0,1] 3{sigma} [SII] 6717A/6731A detectionmeta.codeintWR[0,1] Detection of Wolf-Rayet featuresmeta.codeintNfDisplay the flux measurements for this regionmeta.ref.urlintnullableSpInteractive plot of spectrummeta.ref.urlcharCHb[0.1/1.1] Extinction Correction for H{beta} Flux C(H{beta})phys.absorptionfloate_CHb[0.01/0.03] CHb uncertaintystat.errorfloatFHb[26/2218] H{beta} Flux F(H{beta}) in units of 10-17ergs/s/cm^21e+14W.m**-2phot.flux;em.line.Hbetafloate_FHb[0.7/11] FHb uncertainty1e+14W.m**-2stat.errorfloatEWHb[10.7/1677] H{beta} equivalent Width in units of Angstroms0.1nmspect.line.eqWidth;arith.ratiodoubleEWHa[43.2/10485] H{alpha} equivalent Width in units of Angstroms0.1nmspect.line.eqWidth;arith.ratiodoubleJ/ApJ/808/42/table3aLine fluxes relative to H{beta}recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIIidHII Region (NGC5194 +/-offsets in RA/DE)meta.id;meta.maincharSpeciesSpeciesmeta.notecharlambda[346/9546]? Species Wavelength in Angstroms0.1nmem.wlintnullablel_FluxUpper limit flag on Fluxmeta.code.error;phot.fluxcharFlux[0/10485]? Line flux in units of H{beta}=1phot.flux;arith.ratiodoublenullablee_Flux[0/11]? uncertainty in Fluxstat.error;phot.fluxdoublenullableJ/ApJ/808/42/table5Abundances in NGC 5194e_Te([OIII])2Uncertainty in Te([OIII])2Kstat.errorintTe([NII])2Adopted Electron temperature in the [NII] regionKphys.temperature;phys.electroninte_Te([NII])2Uncertainty in Te([NII])2Kstat.errorintTe([SIII])2Adopted Electron temperature in the [SIII] regionKphys.temperature;phys.electroninte_Te([SIII])2Uncertainty in Te([SIII])2Kstat.errorintNe2Adopted Electron densitycm**-3phys.density;phys.electroninte_Ne2Uncertainty in Ne2cm**-3stat.errorintO+/H+Abundance ratio O+/H+phys.abundfloate_O+/H+Uncertainty in O+/H+stat.error;phys.abundfloatO++/H+Abundance ratio O++/H+phys.abundfloate_O++/H+Uncertainty in O++/H+stat.error;phys.abundfloatHIIidHII Region (NGC5194 +/-offsets in RA/DE)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTe([OII])1? Measured Electron temperature in the [OII] regionKphys.temperature;phys.electronintnullableICF(S)Sulfer ionization correction factorarith.factorfloate_Te([OII])1? Uncertainty in Te([OII])1Kstat.errorintnullableTe([OIII])1? Measured Electron temperature in the [OIII] regionKphys.temperature;phys.electronintnullablee_Te([OIII])1? Uncertainty in Te([OIII])1Kstat.errorintnullableTe([NII])1? Measured Electron temperature in the [NII] regionKphys.temperature;phys.electronintnullablee_Te([NII])1? Uncertainty in Te([NII])1Kstat.errorintnullableTe([SIII])1? Measured Electron temperature in the [SIII] regionKphys.temperature;phys.electronintnullablee_Te([SIII])1? Uncertainty in Te([SIII])1Kstat.errorintnullableNe1Measured Electron density (cm^{-3})cm**-3phys.density;phys.electroninte_Ne1Uncertainty in Ne1cm**-3stat.errorintTe([OII])2Adopted Electron temperature in the [OII] regionKphys.temperature;phys.electroninte_Te([OII])2Uncertainty in Te([OII])2Kstat.errorintTe([OIII])2Adopted Electron temperature in the [OIII] regionKphys.temperature;phys.electronintlogO/HOxygen abundance, 12+log(O/H)phys.abundfloate_logO/HUncertainty in O/Hstat.error;phys.abundfloatN+/H+Abundance ratio N+/H+phys.abundfloate_N+/H+Uncertainty in N+/H+stat.error;phys.abundfloatICF(N)Nitrogen ionization correction factorarith.factorfloate_ICF(N)Uncertainty in ICF(N)stat.errorfloatlog(N/O)Nitrogen-to-oxygen abundance ratio, log(N/O)phys.abundfloate_log(N/O)Uncertainty in O/Hstat.errorfloatlog(N/H)Nitrogen abundance, 12+log(N/H)phys.abundfloate_log(N/H)Uncertainty in N/Hstat.errorfloatS+/H+Abundance ratio S+/H+phys.abundfloate_S+/H+Uncertainty in S+/H+stat.error;phys.abundfloatS++/H+Abundance ratio S++/H+phys.abundfloate_S++/H+Uncertainty in S++/H+stat.error;phys.abundfloate_ICF(S)Uncertainty in ICF(S)stat.errorfloatlog(S/O)Sulfer-to-oxygen abundance ratio, log(S/O)phys.abundfloate_log(S/O)Uncertainty in S/Ostat.errorfloatlog(S/H)Sulfer abundance, 12+log(S/H)phys.abundfloate_log(S/H)Uncertainty in S/Hstat.errorfloatNe++/H+? Abundance ratio Ne++/H+phys.abundfloatnullablee_Ne++/H+? Uncertainty in Ne++/H+stat.error;phys.abundfloatnullableICF(Ne)Neon ionization correction factorarith.factorfloate_ICF(Ne)Uncertainty in ICF(Ne)stat.errorfloatlog(Ne/O)? Neon-to-oxygen abundance ratio, log(Ne/O)phys.abunddoublenullablee_log(Ne/O)? Uncertainty in Ne/Ostat.errordoublenullablelog(Ne/H)? Neon abundance, 12+log(Ne/H)phys.abundfloatnullablee_log(Ne/H)? Uncertainty in Ne/Hstat.errorfloatnullableAr++/H+Abundance ratio Ar++/H+phys.abundfloate_Ar++/H+Uncertainty in Ar++/H+stat.error;phys.abundfloatICF(Ar)Argon ionization correction factorarith.factorfloate_ICF(Ar)Uncertainty in ICF(Ar)stat.errorfloatlog(Ar/O)Argon-to-oxygen abundance ratio, log(Ar/O)phys.abundfloate_log(Ar/O)Uncertainty in Ar/Ostat.errorfloatlog(Ar/H)Argon abundance, 12+log(Ar/H)phys.abundfloate_log(Ar/H)Uncertainty in Ar/Hstat.errorfloat