J/A+A/545/A43ivo://CDS.VizieR/J/A+A/545/A43doi:10.26093/cds/vizier.35450043CDSCedres B.Cepa J.Bongiovanni A.Castaneda H.Sanchez-Portal M.,Tomita A.2013-01-07T21:53:41Z2012-12-28T11:03:50ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionschemical-abundancesWe present here two HII region catalogues with azimuthal resolution for the two grand design galaxies NGC 628 and NGC 6946. With the help of these catalogues, we study several properties of the star-forming processes occurring in spiral galaxies. We obtained direct imaging in the narrow-band filters centred at H{alpha}, H{beta}, [OII]{lambda}3727, and [OIII]{lambda}{lambda}4959, 5007 and their respective continua. After the calibration and correction of the data, we obtained for each HII region the de-reddened fluxes in the aforementioned lines, the size, the H{alpha} equivalent width, and, using two different empirical calibrations, the metallicity. Employing a method based on the Delaunay triangulation, a two-dimensional (2D) representation of the metallicity was obtained.2012A&A...545A..43Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/545/A43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/119/499 : NGC 628 and companions photometric distances (Sharina+ 1996)J/AJ/120/1306 : NGC 628 HII regions (Lelievre+, 2000)J/A+A/466/905 : HII regions in NGC 628 (Fathi+, 2007)J/ApJ/669/525 : VRI photometric standards for NGC 6946 (Welch+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/545/A43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/545/A43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/545/A43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/545/A43https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/545/A43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/545/A43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/545/A43/ngc628 (NGC 628 HII regions data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/545/A43/ngc628?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/545/A43/ngc628?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/545/A43/ngc628?GETtext/xml+votable180.050000true24.199303115.83432640.005555555555555556Cone search capability for table J/A+A/545/A43/ngc6946 (NGC 6946 HII regions data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/545/A43/ngc6946?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/545/A43/ngc6946?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/545/A43/ngc6946?GETtext/xml+votable180.050000true308.755698360.20568080.0055555555555555566/15592-15593 18398https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/545/A43?format=asciiOpticaldefaultJ/A+A/545/A43/ngc628NGC 628 HII regions datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number, within the galaxymeta.recordintXoffOffset along Xarcsecpos.eq.ra;arith.difffloatYoffOffset along Yarcsecpos.eq.dec;arith.difffloatRDeprojected radiusarcminpos.angDistancefloatFHaH{alpha} flux, extinction corrected (in 10^-14^erg/cm2/s)1e-17W.m**-2phot.flux;em.line.Halphafloate_FHarms uncertainty on FHa1e-17W.m**-2stat.errorfloatAVAbsorption in V bandmagphot.mag;em.opt.Vfloate_AVrms uncertainty on AVmagstat.errorfloatAreaAreaarcsec**2phys.areafloat[EWHa]H{alpha} equivalent width (log scale)log(0.1nm)spect.line.eqWidthfloate_[EWHa]rms uncertainty on [EWHa]log(0.1nm)stat.errorfloatFHbH{beta} flux in (in 10^-14^erg/cm2/s)1e-17W.m**-2phot.flux;em.line.Hbetafloate_FHbrms uncertainty on FHb1e-17W.m**-2stat.errorfloat[OII/Hb]? Abundance ratio log([OII]/H{beta}), extinction correctedphys.abundfloatnullablee_[OII/Hb]? rms uncertainty on [OII]/Hb)stat.errorfloatnullable[OIII/Hb]? Abundance ratio log([OIII]/H{beta}), extinction correctedphys.abundfloatnullablee_[OIII/Hb]? rms uncertainty on [OIII/Hb]stat.errorfloatnullableP? Excitation P parameter (1)spect.indexfloatnullablelogR23? R23 parameter (2)spect.indexfloatnullableeps(O/H)? Metallicity, 12+log(O/H)phys.abund.Zfloatnullablee_eps(O/H)? rms uncertainty on 12+log(O/H)stat.errorfloatnullable_RAPosition computed from center (01:36:41.77+15:47:00.5) and Xoff/Yoff (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from center (01:36:41.77+15:47:00.5) and Xoff/Yoff (declination part)degpos.eq.dec;meta.mainJ/A+A/545/A43/ngc6946NGC 6946 HII regions dataP? Excitation P parameter (1)spect.indexfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number, within the galaxymeta.recordintXoffOffset along Xarcsecpos.eq.ra;arith.difffloatYoffOffset along Yarcsecpos.eq.dec;arith.difffloatRDeprojected radiusarcminpos.angDistancefloatFHaH{alpha} flux, extinction corrected (in 10^-14^erg/cm2/s)1e-17W.m**-2phot.flux;em.line.Halphafloate_FHarms uncertainty on FHa1e-17W.m**-2stat.errorfloatAVAbsorption in V bandmagphot.mag;em.opt.Vfloate_AVrms uncertainty on AVmagstat.errorfloatAreaAreaarcsec**2phys.areafloat[EWHa]H{alpha} equivalent width (log scale)log(0.1nm)spect.line.eqWidthfloate_[EWHa]rms uncertainty on [EWHa]log(0.1nm)stat.errorfloatFHbH{beta} flux in (in 10^-14^erg/cm2/s)1e-17W.m**-2phot.flux;em.line.Hbetafloate_FHbrms uncertainty on FHb1e-17W.m**-2stat.errorfloat[OII/Hb]? Abundance ratio log([OII]/H{beta}), extinction correctedphys.abundfloatnullablee_[OII/Hb]? rms uncertainty on [OII]/Hb)stat.errorfloatnullable[OIII/Hb]? Abundance ratio log([OIII]/H{beta}), extinction correctedphys.abundfloatnullablee_[OIII/Hb]? rms uncertainty on [OIII/Hb]stat.errorfloatnullablelogR23? R23 parameter (2)spect.indexfloatnullableeps(O/H)? Metallicity, 12+log(O/H)phys.abund.Zfloatnullablee_eps(O/H)? rms uncertainty on 12+log(O/H)stat.errorfloatnullable_RAPosition computed from center (20:34:52.33+60:09:13.2) and Xoff/Yoff (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from center (20:34:52.33+60:09:13.2) and Xoff/Yoff (declination part)degpos.eq.dec;meta.main