J/A+A/691/A173ivo://CDS.VizieR/J/A+A/691/A173doi:10.26093/cds/vizier.36910173CDSBrazzini M.Belfiore F.Ginolfi M.Groves B.Kreckel K.Vaught J.R.R.,Baron D.Bigiel F.Blanc A.G.Dale A.D.Grasha K.Habjan E.,Klessen S.R.Mendez-Delgado J.E.Sandstrom K.Williams G.T.2025-02-26T20:01:46Z2024-11-13T07:42:22ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionschemical-abundancesWe present a chemical analysis of selected HII regions from the PHANGS-MUSE nebular catalogue. Our intent is to empirically re-calibrate strong-line diagnostics of gas-phase metallicity, applicable across a wide range of metallicities within nearby star-forming galaxies. To ensure reliable measurements of auroral line fluxes, we carried out a new spectral fitting procedure whereby only restricted wavelength regions around the emission lines of interest are taken into account: this assures a better fit for the stellar continuum. No prior cuts to nebulae luminosity were applied to limit biases in auroral line detections. Ionic abundances of O^+^, O^2+^, N^+^, S^+^, and S^2+^ were estimated by applying the direct method. We integrated the selected PHANGS-MUSE sample with other existing auroral line catalogues, appropriately re-analysed to obtain a homogeneous dataset. This was used to derive strong-line diagnostic calibrations that span from 12+log(O/H)=7.5 to 8.8. We investigate their dependence on the ionisation parameter and conclude that it is likely the primary cause of the significant scatter observed in these diagnostics. We apply our newly calibrated strong-line diagnostics to the total sample of HII regions from the PHANGS-MUSE nebular catalogue, and we exploit these indirect metallicity estimates to study the radial metallicity gradient within each of the 19 galaxies of the sample. We compare our results with the literature and find good agreement, validating our procedure and findings. With this paper, we release the full catalogue of auroral and nebular line fluxes for the selected HII regions from the PHANGS-MUSE nebular catalogue. This is the first catalogue of direct chemical abundance measurements carried out with PHANGS-MUSE data.2024A&A...691A.173Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/691/A173CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/691/A173https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/691/A173http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/691/A173https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/691/A173https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/691/A173http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/691/A173GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/691/A173/catalog (Selected regions abundances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/691/A173/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/691/A173/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/691/A173/catalog?GETtext/xml+votable180.050000true353.6007935589837-36.10684852234220.0055555555555555566/17747 17753 18398 24912 26303 27728 33920-33921 33958 34343 34531 36134 40328 46481 46549https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/691/A173?format=asciidefaultJ/A+A/691/A173/catalogSelected regions abundancesIDHII region IDmeta.id;meta.maininte_A(O)Error on oxygen abundancestat.errordoubleA(S)Sulphur abundancephys.abunddoublee_A(S)Error on sulphur abundancestat.errordoubleA(N)Nitrogen abundancephys.abunddoublee_A(N)Error on nitrogen abundancestat.errordoubleGalaxyGalaxy namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.maine_FSII6717SII6717 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFSII6731SII6731 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FSII6731SII6731 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFOII7320OII7320 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxfloate_FOII7320OII7320 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFOII7330OII7330 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxfloate_FOII7330OII7330 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFOIIcorfactOII flux error correction factorarith.factor;phot.fluxdoubleFOIII4959OIII4959 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FOIII4959OIII4959 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFSIII6312SIII6312 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxfloate_FSIII6312SIII6312 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFSIIIcorfactSIII flux error correction factorarith.factor;phot.fluxdoubleFSIII9069SIII9069 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FSIII9069SIII9069 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFNII6584NII6584 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FNII6584NII6584 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFNII6548NII6548 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FNII6548NII6548 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloattemNIITemperature from NIIKphys.temperaturedoubleAvAbsorptionmagphot.magfloatFHbH{beta} flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.flux;em.line.Hbetadoublee_FHbH{beta} flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFHaH{alpha} flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.flux;em.line.Halphadoublee_FHaH{alpha} flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFOIII5007OIII5007 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_FOIII5007OIII5007 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFNII5756NII5756 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxfloate_FNII5756NII5756 flux error (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2stat.errorfloatFNIIcorfactNII flux error correction factor1e-20W.m**-2arith.factor;phot.fluxdoubleFSII6717SII6717 flux (in 10^-17^erg/s/cm^2^ unit)1e-20W.m**-2phot.fluxdoublee_temNIIError on temNIIKstat.errordoubletemSIIITemperature from SIIIKphys.temperaturedoublee_temSIIIError on temSIIIKstat.errordoubleNeElectron number densitycm**-3meta.iddoublee_NeError on electron number densitycm**-3stat.errordoubleA(O)Oxygen abundancephys.abunddouble