J/ApJ/772/27ivo://CDS.VizieR/J/ApJ/772/27doi:10.26093/cds/vizier.17720027CDSLiu G.Calzetti D.Kennicutt R.C.JRSchinnerer E.Sofue Y.Komugi S.,Egusa F.Scoville N.Z.2018-01-05T08:56:16Z2015-02-26T12:11:11ZCDS support team

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

cds-question@unistra.frgalaxieshst-photometryh-ii-regionsinfrared-sourcesThe H II region luminosity function (LF) is an important tool for deriving the birthrates and mass distribution of OB associations and is an excellent tracer of the newly formed massive stars and associations. To date, extensive work (predominantly in H{alpha}) has been done from the ground, which is hindered by dust extinction and the severe blending of adjacent (spatially or in projection) H II regions. Reliably measuring the properties of H II regions requires a linear resolution <40pc, but analyses satisfying this requirement have been done only in a handful of galaxies, so far. As the first space-based work using a galaxy sample, we have selected 12 galaxies from our HST/NICMOS Pa{alpha} survey and studied the LF and size distribution of H II regions both in individual galaxies and cumulatively, using a virtually extinction-free tracer of the ionizing photon rate. The high angular resolution and low sensitivity to diffuse emission of NICMOS also offer an advantage over ground-based imaging by enabling a higher degree of de-blending of the H II regions. We do not confirm the broken power-law LFs found in ground-based studies. Instead, we find that the LFs, both individual and co-added, follow a single power law dN(L)/dlnL{propto}L^-1^, are consistent with the mass function of star clusters in nearby galaxies, and are in agreement with the results of the existing analyses with Hubble Space Telescope (HST) data. The individual and co-added size distributions of H II regions are both roughly consistent with dN(D)/dlnD{propto}D^-3^, but the power-law scaling is probably contaminated by blended regions or complexes.2013ApJ...772...27Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/772/27CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/238 : HYPERLEDA. II. Homogenized HI data (Paturel+, 2003)VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)VII/145 : Nearby Galaxies Catalogue (NBG) (Tully 1988)J/A+A/551/A81 : NGC 6951 intensity and velocity maps (van der Laan+, 2013)J/ApJ/756/117 : HyperLeda sample of nearby elliptical gal. (Focardi+, 2012)J/ApJ/735/75 : HST observations of HII regions in M51 (Lee+, 2011)J/AJ/142/139 : A new catalog of HII regions in M31 (Azimlu+, 2011)J/AJ/141/113 : HII regions of M51 and NGC 4449 (Gutierrez+, 2011)J/AJ/138/1938 : EDD: All Digital HI profile catalog (Courtois+, 2009)J/AJ/138/332 : LEDA CMD/tip of the red giant branch (Jacobs+, 2009)J/AJ/136/2782 : Star formation efficiency in nearby galaxies (Leroy+, 2008)J/ApJ/671/333 : Aperture photometry in NGC 5194 (Kennicutt+, 2007)J/A+A/459/L13 : A composite HII region luminosity function (Bradley+, 2006)J/A+A/393/57 : Velocity field in the Local Group (Terry+, 2002)J/A+A/354/823 : HII region catalogue of NGC 3359 (Rozas+, 2000)J/PASP/111/685 : HII regions of M33. II. (Hodge+, 1999)J/A+AS/135/145 : HII region catalogue of NGC 7479 (Rozas+, 1999)J/A+AS/131/317 : NGC 7331 HII regions catalogue (Petit 1998)J/MNRAS/297/255 : HII region catalogue of M100 (Knapen, 1998)J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)J/AJ/104/92 : HII Regions Properties in M101 (Scowen+ 1992)http://edd.ifa.hawaii.edu/ : The Extragalactic Distance Database home pagehttp://leda.univ-lyon1.fr/ : HyperLeda databasehttp://ned.ipac.caltech.edu/ : NASA/IPAC Extragalactic database (NED)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/772/27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/772/27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/772/27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/772/27https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/772/27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/772/27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/772/27/table1 (Characteristics of the sample galaxies and their HST Pa{alpha} data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/772/27/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/772/27/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/772/27/table1?GETtext/xml+votable180.050000true13.017916747.55053610.005555555555555556Cone search capability for table J/ApJ/772/27/table2 (Catalog of the 1907 HII regions detected with S/N{>=}3 in our sample of 12 galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/772/27/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/772/27/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/772/27/table2?GETtext/xml+votable180.050000true13.02791747.5500560.0055555555555555566/932 2687 5966 5975 6034 10991 11246 17754 26472 27828 28529 35993 38390https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/772/27?format=asciiInfrareddefaultJ/ApJ/772/27/table1Characteristics of the sample galaxies and their HST Pa{alpha} datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharprimaryNrNumber of HII regions in this galaxy (link to table 2)meta.numberintnullableMorphMorphological type from NEDsrc.morph.typecharTT[2/7] numerical Hubble type (as defined in de Vaucouleurs et al. 1991, VII/155) from HyperLedameta.note;src.morph.typefloatInc[12.8/69.4] Inclination from HyperLedadegsrc.orbital.inclinationfloatDist[7.11/22.7] DistanceMpcpos.distance;pos.heliocentricfloatr_Dist[1/6] Reference for Dist (1)meta.ref;pos.frameintFOV[1.8/5.6] Linear scale of field of viewkpcsrc.morph.scLengthfloatRes[9/29] Linear resolutionpcpos.distanceintTypeAGN typesrc.classcharr_TypeReference for AGN Type (2)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlcharLEDASimbad column added by the CDSmeta.ref.urlchar_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.mainJ/ApJ/772/27/table2Catalog of the 1907 HII regions detected with S/N{>=}3 in our sample of 12 galaxiesNameGalaxy identifier (NGCNNNN)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/338] H II region identifiermeta.id;meta.mainintRAJ2000Hour of the Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainlogL[36/39.7] Log region Pa{alpha} luminosity; erg/s (1)log(1e-07W)phys.luminosity;em.IR.HfloatDiam[16.8/321] Equivalent diameter (2)pcpos.distancefloatS/N[3/69.4] Region signal-to-noise ratiostat.snr;obs.fieldfloat