J/AJ/138/1203ivo://CDS.VizieR/J/AJ/138/1203doi:10.26093/cds/vizier.51381203CDSMelena N.W.Elmegreen B.G.Hunter D.A.Zernow L.2017-12-21T15:26:23Z2012-02-10T08:07:33ZCDS support team

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

cds-question@unistra.frgalaxiesultraviolet-astronomyvisible-astronomyWide-band photometryWe compare star formation in the inner and outer disks of 11 dwarf irregular galaxies (dIm) within 3.6Mpc. The regions are identified on Galaxy Evolution Explorer near-UV images, and modeled with UV, optical, and near-IR colors to determine masses and ages. A few galaxies have made 10^5^-10^6^M_{sun}_ complexes in a starburst phase, while others have not formed clusters in the last 50Myr. The maximum region mass correlates with the number of regions as expected from the size-of-sample effect. We find no radial gradients in region masses and ages, even beyond the realm of H{alpha} emission, although there is an exponential decrease in the luminosity density and number density of the regions with radius. H{alpha} is apparently lacking in the outer parts only because nebular emission around massive stars is too faint to see. The outermost regions for the five galaxies with HI data formed at average gas surface densities of 1.9-5.9M_{sun}/pc^2^.2009AJ....138.1203Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1203CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/495/447 : PN and HII regions in NGC6822 (Hernandez-Martinez+, 2009)J/ApJ/706/599 : H{alpha} and UV SFR in the local volume (Lee+, 2009)J/ApJS/162/49 : UBV imaging of irregular galaxies (Hunter+, 2006)J/AJ/132/378 : HST and UV photometry of NGC 6822 (Bianchi+, 2006)J/AJ/121/2020 : CTIO and WFPC2 photometry in NGC 6822 (Bianchi+, 2001)J/AJ/105/894 : Star formation in DDO 210 and NGC 3109 (Greggio+ 1993)J/A+AS/125/293 : NGC 2366, NGC 2403 + NGC 4236 HK' photometry (Pierini+ 1997)J/AJ/110/2715 : UBV photometry in NGC 6822, M31 and M33 (Massey+ 1995)J/AJ/109/173 : BVR photometry of NGC 6822 (Marconi+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/138/1203https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/138/1203http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/138/1203https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/138/1203https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/138/1203http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/138/1203GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/138/1203/table1 (Galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/1203/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/1203/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/1203/table1?GETtext/xml+votable180.050000true124.770737570.72003060.005555555555555556Cone search capability for table J/AJ/138/1203/table3 (Region photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/1203/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/1203/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/1203/table3?GETtext/xml+votable180.050000true124.7970.7552780.0055555555555555566/7799 7876 7878 7970 17165 18041 19833 19990 26858 27351 29716 29718 48942 48943https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/138/1203?format=asciiUVOpticaldefaultJ/AJ/138/1203/table1Galaxy sampleSimbadNameSimbad column added by the CDSmeta.idcharDistDistanceMpcpos.distance;pos.heliocentricfloatONameOther name(s)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy name (1)meta.id;meta.maincharprimaryHEDisplay the data from Hunter & Elmegreen 2006, Cat. J/ApJS/162/49meta.ref.urlcharE(B-V)Foreground reddening from Burstein & Heiles, 1984ApJS...54...33Bmagphot.color.excessfloatVMagAbsolute V-band magnitudemagphot.mag;em.opt.VfloatRD? Disk scale length determined from V-band imagesarcminphys.angSize;srcfloatnullablePA[-85,88] Galactic position angle of the major axis determined from V-band imagesdegpos.posAng;pos.galacticintiInclination of galactic diskdegsrc.orbital.inclinationintNEDSimbad column added by the CDSchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainJ/AJ/138/1203/table3Region photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id.parentcharRegStar-forming region numbermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRDistance from galaxy center (1)kpcpos.distancefloatR/RDSame as R but divided by disk scale length (2)pos.distancefloatradiusStar-forming region radius (3)pcmeta.idfloatNUVMagAbsolute GALEX NUV filter AB magnitudemagphys.magAbs;instr.filterfloate_NUVMagThe 1{sigma} error in NUVMagmagstat.error;phot.magfloatF-NIntrinsic GALEX (FUV-NUV) color indexmagphot.color;em.UVfloate_F-NThe 1{sigma} error in F-Nmagstat.errorfloatVMagAbsolute V filter AB magnitudemagphys.magAbs;em.opt.Vfloate_VMagThe 1{sigma} error in VMagmagstat.error;phot.mag;em.opt.VfloatB-VIntrinsic (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-VThe 1{sigma} error in B-Vmagstat.error;phot.color;em.opt.BfloatU-BIntrinsic (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloate_U-BThe 1{sigma} error in U-Bmagstat.error;phot.color;em.opt.UfloatlogMLog star-forming region mass (4)log(solMass)meta.idfloatlogALog star-forming region age (4)log(yr)meta.idfloatRMSrms deviation between observed & modeled colorsmagstat.stdev;phot.mag;meta.modelledfloat