J/A+A/710/A412ivo://CDS.VizieR/J/A+A/710/A412CDSRazza A.Blanc G.A.Groves B.Congiu E.Neumann J.Pan H.-A.Ho I-T.,Barnes A.T.Belfiore F.Boquien M.Burton C.Chevance M.Egorov O.,Emsellem E.Faesi C.Glover S.C.O.Grasha K.Klessen R.S.Kreckel K.,Leroy A.K.McElroy R.Pessa I.Schinnerer E.Tomicic N.Amiri A.,Anand G.S.Cao Y.Dale D.A.Dlamini S.Li J.Mendez-Delgado J.E.,Murphy E.J.Pathak D.Querejeta M.Ramambason L.Rosolowsky E.,Scheuermann F.Ubeda L.Williams T.G.2026-07-01T08:13:15Z2026-07-01T09:11:25ZCDS support team

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

cds-question@unistra.frstar-forming-regionsvisible-astronomyh-alpha-photometryWe present PHANGS-H{alpha}, a narrowband imaging survey that maps H{alpha} emission over a sample of 65 nearby massive star-forming galaxies. The data were obtained using the MPG-ESO 2.2-meter telescope at La Silla and the du Pont 2.5-meter telescope at Las Campanas Observatory, within the framework of the multi-wavelength cloud-scale (50-100pc) resolution mapping of molecular gas and star formation conducted by the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) collaboration. PHANGS-H{alpha} complements the published PHANGS-ALMA, PHANGS-MUSE, PHANGS-HST, and PHANGS-JWST surveys, providing an anchor point for the photometric and astrometric calibration of these datasets, as well as samples of HII regions and star formation rate maps for the bulk of the PHANGS sample. We describe the observations, data processing, and calibration of the PHANGS-H{alpha} dataset, as well as the procedures used to derive emission-line fluxes from narrowband imaging. A subset of galaxies with available spectroscopic Ha mapping from the PHANGS-MUSE survey serves as the basis of a detailed comparison with the narrowband photometry presented here. This comparison informs a set of best practices for the processing of narrowband H{alpha} imaging, which we subsequently apply to the full dataset.2026A&A...710A.412Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A412CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/219/4 : S4G pipeline 4: multi-component decompositions (Salo+, 2015)J/ApJ/897/122 : Rotational velocities for PHANGS sample of galaxiesJ/ApJS/257/43 : PHANGS-ALMA: arcsecond CO(2-1) imaging of galaxieshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/710/A412https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/710/A412http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/710/A412https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/710/A412https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/710/A412http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/710/A412GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/710/A412/tablef1 (Global properties of the PHANGS-H{alpha} sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A412/tablef1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A412/tablef1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A412/tablef1?GETtext/xml+votable180.050000true52.879583-51.9048610.005555555555555556Cone search capability for table J/A+A/710/A412/tablef2 (Observational parameters and derived quantities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A412/tablef2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A412/tablef2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A412/tablef2?GETtext/xml+votable180.050000true52.8808042-51.90487220.0055555555555555566/4149 17747 18398 20526 20929 24912 25135 25762 25788 25790 26119 26303 26338 26472 27514 27728 27738 27750 27861 27905 27917-27918 27937 27942 27949 28035 28046 28167 28208 28264 28304 33077 33176 33228 33654 33920 33954 33958 34272 34343 34404 34495 34531 34545 34910 36134 36261 36990 38655 40328 40472 42016 43325 43339 44011 44027 45748 46481 46495 46519 46549https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/710/A412?format=asciiOpticaldefaultJ/A+A/710/A412/tablef1Global properties of the PHANGS-H{alpha} samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharTelTelescope(s) usedinstr.setupcharTypeMorphological T-type (LEDA)src.morphcharRAJ2000Right Ascension (J2000) (S4G, Salo et al., 2015ApJS..219....4S, Cat. J/ApJS/219/4)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (S4G, Salo et al., 2015ApJS..219....4S, Cat. J/ApJS/219/4)pos.eq.dec;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharDistDistance (Anand et al., 2021MNRAS.501.3621A)Mpcpos.distancefloatRVRadial velocity (Lang et al., 2020ApJ...897..122L, Cat. J/ApJ/897/122)km/sphys.veloc;pos.heliocentricintR25Isophotal radius (HyperLEDA)arcsecphys.angSizeintInclInclination (Lang et al., 2020ApJ...897..122L, Cat. J/ApJ/897/122)degsrc.orbital.inclinationfloatPA[] Position Angle (Lang et al., 2020ApJ...897..122L, Cat. J/ApJ/897/122)degpos.posAngfloatMstarStellar mass (Leroy et al., 2021ApJS..257...43L, cat. J/ApJS/257/43)1e+10solMassphys.massfloatSFRStar Formation Rate (Leroy et al., 2021ApJS..257...43L, cat. J/ApJS/257/43)solMass/yrphys.SFRfloatPHANGS-MUSE[0/1] Flag: 1 if PHANGS-MUSE overlapmeta.codeintJ/A+A/710/A412/tablef2Observational parameters and derived quantitiesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharBBFilBroad-band filter namemeta.code;instr.filtercharBBExpBroad-band integration timestime.expointBBLimBroad-band 3-sigma surface brightness sensitivitymag.arcsec**-2phot.mag.sbfloatBBResABroad-band PSF FWHM in arcsecarcsecphys.angSizefloatBBResPBroad-band PSF FWHM in parsecpcphys.size.radiusintNBFilNarrow-band filter namemeta.code;instr.filtercharNBExpNarrow-band Integration timestime.expointNBLimNarrow-band 3-sigma surface brightness sensitivitymag.arcsec**-2phot.mag.sbfloatNBResANarrow-band PSF FWHM in arcsecarcsecphys.angSizefloatNBResPNarrow-band PSF FWHM in parsecpcphys.size.radiusintHaLimH-alpha 3-sigma surface brightness sensitivity in 10^-16^erg/s/cm^2^/arcsec^2^ unit1e-19W.m**-2.arcsec**-2meta.unitfloatFNII[0.16/0.47] [NII]/H-alpha fraction (1)phys.abundfloatTHaH-alpha effective filter transmissionmeta.code;instr.filterfloatlogLHaIntegrated H-alpha luminosity in log(erg/s) unit (2)log(1e-07W)phys.luminosity;em.line.Halphafloat_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.main