J/MNRAS/520/4902ivo://CDS.VizieR/J/MNRAS/520/4902doi:10.26093/cds/vizier.75204902CDSGroves B.Kreckel K.Santoro F.Belfiore F.Zavodnik E.Congiu E.,Egorov O.V.Emsellem E.Grasha K.Leroy A.Scheuermann F.,Schinnerer E.Watkins E.J.Barnes A.T.Bigiel F.Dale D.A.,Glover S.C.O.Pessa I.Sanchez-Blazquez P.Williams T.G.2025-05-21T20:18:34Z2025-03-07T14:47:01ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyinterstellar-mediumh-ii-regionschemical-abundancesIonized nebulae provide critical insights into the conditions of the interstellar medium (ISM). Their bright emission lines enable the measurement of physical properties, such as the gas-phase metallicity, across galaxy discs and in distant galaxies. The PHANGS-MUSE survey has produced optical spectroscopic coverage of the central star-forming discs of 19 nearby main-sequence galaxies. Here, we use the Halpha morphology from this data to identify 30790 distinct nebulae, finding thousands of nebulae per galaxy. For each nebula, we extract emission line fluxes and, using diagnostic line ratios, identify the dominant excitation mechanism. A total of 23244 nebulae (75 per cent) are classified as HII regions. The dust attenuation of every nebulae is characterized via the Balmer decrement and we use existing environmental masks to identify their large-scale galactic environment (centre, bar, arm, interarm, and disc). Using strong-line prescriptions, we measure the gas-phase oxygen abundances (metallicity) and ionization parameter for all HII regions. With this new catalogue, we measure the radial metallicity gradients and explore second-order metallicity variations within each galaxy. By quantifying the global scatter in metallicity per galaxy, we find a weak negative correlation with global star formation rate and stronger negative correlation with global gas velocity dispersion (in both ionized and molecular gas). With this paper we release the full catalogue of strong line fluxes and derived properties, providing a rich data base for a broad variety of ISM studies.2023MNRAS.520.4902Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/4902CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/520/4902https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/520/4902http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/520/4902https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/520/4902https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/520/4902http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/520/4902GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/520/4902/catalog (PHANGS-MUSE nebular catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/4902/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/4902/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/4902/catalog?GETtext/xml+votable180.050000true353.6217889985926-36.08620566098430.005555555555555556Cone search capability for table J/MNRAS/520/4902/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/4902/list?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/4902/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/4902/list?GETtext/xml+votable180.050000true353.6145-36.202060.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/MNRAS/520/49026/17747 17753 18398 24912 26303 27514 27728 27861 28033 28035 28167 33920-33921 33958 34343 34382 34404 34531 36134 36261 40328 46481 46549https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/520/4902?format=asciiOpticaldefaultJ/MNRAS/520/4902/catalogPHANGS-MUSE nebular cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_logU? Error on the ionization parameter (logU_err)stat.error;pos.cartesian.xdoublenullableGalaxyGalaxy name (gal_name)meta.id;meta.maincharRegionIDRegion ID in the segmentation mask (region_ID)meta.id;obs.fieldfloatRAJ2000Right ascension center (J2000), weighted by H{alpha} intensity (cen_ra)degpos.eq.ra;meta.mainindexedDEJ2000Declination center (J2000), weighted by H{alpha} intensity (cen_dec)degpos.eq.dec;meta.mainindexedFlagEdge[0/1] Flag set to 1 if within one PSF of the field edge (flag_edge)meta.code.errorintFlagStar[0/1] Flag set to 1 if overlapping with a star (flag_star)meta.code.errorintdeprojphiDeprojected position angle within galaxy disc (deproj_phi)degpos.posAngdoubleAreaH II region area (region_area)pixphys.areaintFHb4861H{beta} flux (HB4861_FLUX)1e-23W.m**-2phot.flux;em.line.HbetadoubleFOIII5006OIII5007 flux (OIII5006_FLUX)1e-23W.m**-2phot.fluxdoubleFHa6562H{alpha} flux (HA6562_FLUX)1e-23W.m**-2phot.flux;em.line.HalphadoubleFNII6583NII6584 flux (NII6583_FLUX)1e-23W.m**-2phot.fluxdoubleFSII6716SII6717 flux (SII6716_FLUX)1e-23W.m**-2phot.fluxdoubleFSII6730SII6731 flux (SII6730_FLUX)1e-23W.m**-2phot.fluxdoubleFSIII9068SIII9068 flux (SIII9068_FLUX)1e-23W.m**-2phot.fluxdoubleFOI6300OI6300 flux (OI6300_FLUX)1e-23W.m**-2phot.fluxdoublee_FHb4861H{beta} flux error (HB4861_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FOIII5006OIII5007 flux error (OIII5006_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FHa6562H{alpha} flux error (HA6562_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FNII6583NII6584 flux error (NII6583_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FSII6716SII6717 flux error (SII6716_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FSII6730SII6731 flux error (SII6730_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FSIII9068SIII9068 flux error (SIII9068_FLUX_ERR)1e-23W.m**-2stat.errordoublee_FOI6300OI6300 flux error (OI6300_FLUX_ERR)1e-23W.m**-2stat.errordoublesigmaHa6562H{alpha} velocity dispersion (HA6562_SIGMA)km/sphys.veloc.dispersion;spect.linedoublesigmaNII6583NII6584 velocity dispersion (NII6583_SIGMA)km/sphys.veloc.dispersiondoublesigmaOIII5006OIII5007 velocity dispersion (OIII5006_SIGMA)km/sphys.veloc.dispersiondoubleVHa6562H{alpha} velocity (HA6562_VEL)km/sspect.dopplerVelocdoubleVNII6583NII6584 velocity (NII6583_VEL)km/sspect.dopplerVelocdoubleVOIII5006OIII5007 velocity (OIII5006_VEL)km/sspect.dopplerVelocdoublee_sigmaHa6562H{alpha} velocity dispersion error (HA6562_SIGMA_ERR)km/sstat.errordoublee_sigmaNII6583NII6584 velocity dispersion error (NII6583_SIGMA_ERR)km/sstat.errordoubleAV? V-band attenuation derived from the Balmer decrement assuming an O'Donnell (1994ApJ...422..158O) extinction curve and RV=3.1 (AV)magphys.absorptiondoublenullablee_AV? Error on V-band attenuation (AV_ERR)magstat.errordoublenullablee_sigmaOIII5006OIII5007 velocity dispersion error (OIII5006_SIGMA_ERR)km/sstat.errordoublee_VHa6562H{alpha} velocity error (HA6562_VEL_ERR)km/sstat.errordoublee_VNII6583NII6584 velocity error (NII6583_VEL_ERR)km/sstat.errordoublee_VOIII5006OIII5007 velocity error (OIII5006_VEL_ERR)km/sstat.errordoubleFHB4861cor? H{beta} attenuation corrected flux (HB4861_FLUX_CORR)1e-23W.m**-2phot.flux;em.line.HbetadoublenullableFOIII5006cor? OIII5007 attenuation corrected flux (OIII5006_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullableFHa6562cor? H{alpha} attenuation corrected flux (HA6562_FLUX_CORR)1e-23W.m**-2phot.flux;em.line.HalphadoublenullableFNII6583cor? NII6584 attenuation corrected flux (NII6583_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullableFSII6716cor? SII6717 attenuation corrected flux (SII6716_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullableFSII6730cor? SII6731 attenuation corrected flux (SII6730_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullableFSIII9068cor? SIII9068 attenuation corrected flux (SIII9068_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullableFOI6300cor? OI6300 attenuation corrected flux (OI6300_FLUX_CORR)1e-23W.m**-2phot.fluxdoublenullablee_FHB4861cor? H{beta} attenuation corrected flux error (HB4861_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FOIII5006cor? OIII5007 attenuation corrected flux error (OIII5006_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FHa6562cor? H{alpha} attenuation corrected flux error (HA6562_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FNII6583cor? NII6584 attenuation corrected flux error (NII6583_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FSII6716cor? SII6717 attenuation corrected flux error (SII6716_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FSII6730cor? SII6731 attenuation corrected flux error (SII6730_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FSIII9068cor? SIII9068 attenuation corrected flux error (SIII9068_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullablee_FOI6300cor? OI6300 attenuation corrected flux error (OI6300_FLUX_CORR_ERR)1e-23W.m**-2stat.errordoublenullableMetScal? Metallicity determined using the Scal prescription (Pilyugin et al., 2016MNRAS.457.3678P) (met_scal)phys.abund.Fedoublenullablee_MetScal? Error on the Scal metallicity (met_scal_err)stat.errordoublenullableBPT-NII[-1/3] BPT flag (BPT_NII) (1)meta.codeintBPT-SII[-1/3] BPT flag (BPT_SII) (1)meta.codeintBPT-OI[-1/3] BPT flag (BPT_OI) (1)meta.codeintEnv[1/9] Environment flag from Querejeta et al., 2021A&A...656A.133Q (Environment)meta.codeintDMetScal? Offset in metallicity relative to the radial gradient (Delta_met_scal)phys.abund.FedoublenullabledeprojrR25Deprojected distance from galaxy centre in units of R25 (deproj_r_R25)pos.distancedoubledeprojrreffDeprojected distance from galaxy centre in units of reff (deproj_r_reff)pos.distancedoubleEWHa6562rawEquivalent width of Ha, measured directly (EW_HA6562_raw)0.1nmspect.line.eqWidthdoublee_EWHa6562raw[] Error on H{alpha} equivalent width (EW_HA6562_raw_ERR)0.1nmstat.errordoubleEWHb4861rawEquivalent width of Hb, measured directly (EW_HB4861_raw)0.1nmspect.line.eqWidthdoublee_EWHb4861raw[] Error on H{alpha} equivalent width (EW_HB4861_raw_ERR)0.1nmstat.errordoubleEWHa6562fitEquivalent width of Ha, measured after stellar continuum subtraction (EW_HA6562_fit)0.1nmspect.line.eqWidth;spect.continuumdoublee_EWHa6562fitError on H{alpha} equivalent width after continuum subtraction (EW_HA6562_fit_ERR)0.1nmstat.errordoubleEWHb4861fitEquivalent width of Hb, measured after stellar continuum subtraction (EW_HB4861_fit)0.1nmspect.line.eqWidth;spect.continuumdoublee_EWHb4861fitError on H{alpha} equivalent width after continuum subtraction (EW_HB4861_fit_ERR)0.1nmstat.errordoublelogU? Ionization parameter from SIII/SII using the prescription in Diaz et al., 1991MNRAS.253..245D (logU)phys.ionizParamdoublenullableLHa6562cor? Attenuation corrected H{alpha} luminosity (HA6562_LUM_CORR)1e-07Wphys.luminosity;em.line.HalphadoublenullableJ/MNRAS/520/4902/listList of fits imagesRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar