J/ApJS/234/24ivo://CDS.VizieR/J/ApJS/234/24doi:10.26093/cds/vizier.22340024CDSMurphy E.J.Dong D.Momjian E.Linden S.Kennicutt R.C.Meier D.S.,Schinnerer E.Turner J.L.2019-11-11T22:00:00Z2018-08-29T15:05:14ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesradio-continuum-emissioninterferometryvisible-astronomyh-alpha-photometryactive-galactic-nucleistar-forming-regionsWe present 33GHz imaging for 112 pointings toward galaxy nuclei and extranuclear star-forming regions at ~2" resolution using the Karl G. Jansky Very Large Array (VLA) as part of the Star Formation in Radio Survey. A comparison with 33GHz Robert C. Byrd Green Bank Telescope single-dish observations indicates that the interferometric VLA observations recover 78%+/-4% of the total flux density over 25" regions (~kpc scales) among all fields. On these scales, the emission being resolved out is most likely diffuse non-thermal synchrotron emission. Consequently, on the ~30-300pc scales sampled by our VLA observations, the bulk of the 33GHz emission is recovered and primarily powered by free-free emission from discrete HII regions, making it an excellent tracer of massive star formation. Of the 225 discrete regions used for aperture photometry, 162 are extranuclear (i.e., having galactocentric radii rG>=250pc) and detected at >3{sigma} significance at 33GHz and in H{alpha}. Assuming a typical 33GHz thermal fraction of 90%, the ratio of optically-thin 33GHz to uncorrected H{alpha} star formation rates indicates a median extinction value on ~30-300pc scales of A_H{alpha}_~1.26+/-0.09mag, with an associated median absolute deviation of 0.87mag. We find that 10% of these sources are "highly embedded" (i.e., A_H{alpha}_>~3.3mag), suggesting that on average, HII regions remain embedded for <~1Myr. Finally, we find the median 33GHz continuum-to-H{alpha} line flux ratio to be statistically larger within rG<250pc relative to the outer disk regions by a factor of 1.82+/-0.39, while the ratio of 33GHz to 24{mu}m flux densities is lower by a factor of 0.45+/-0.08, which may suggest increased extinction in the central regions.2018ApJS..234...24Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/234/24CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)J/ApJ/559/864 : Extragalactic ultracompact H II regions (Johnson+, 2001)J/ApJ/577/31 : PNe in six galaxies (Ciardullo+, 2002)J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)J/ApJS/190/233 : Spectroscopy & abundances of SINGS galaxies (Moustakas+, 2010)J/ApJ/761/97 : Star Formation in Radio Survey (SFRS): 33GHz (Murphy+, 2012)J/A+A/576/A33 : KINGFISH galaxy sample radial profile SED (Hunt+, 2015)J/ApJ/836/185 : Radio continuum SEDs from KINGFISHER (Tabatabaei+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/234/24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/234/24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/234/24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/234/24https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/234/24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/234/24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/234/24/table6 (*Source photometry at 7" resolution)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/234/24/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/234/24/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/234/24/table6?GETtext/xml+votable180.050000true14.9584167-7.57608330.005555555555555556Cone search capability for table J/ApJS/234/24/table1 (Galaxy properties and nuclear source positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/234/24/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/234/24/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/234/24/table1?GETtext/xml+votable180.050000true14.959583-7.5788890.005555555555555556Cone search capability for table J/ApJS/234/24/table2 (Extranuclear source positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/234/24/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/234/24/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/234/24/table2?GETtext/xml+votable180.050000true24.18791715.79750.005555555555555556Cone search capability for table J/ApJS/234/24/table5 (Source photometry (full resolution))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/234/24/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/234/24/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/234/24/table5?GETtext/xml+votable180.050000true14.9583333-7.57630560.0055555555555555566/764 2320 3506 4447 5181 5492 5715 5751 5799 7241 7602 7604 7624 7743 7799 8106 10761 10841 10856 10901 11026 11027 11434 11457 13522 15592 15593 16441 17594 18398 23178 25083 25946 26271 27030 27514 27555 27830 27861 27914 27937 28015 28035 28123 28167 28496 35993 36194 36241 38390 438452.1866029582016434e-23 1.000830682546041e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/234/24?format=asciiInfraredRadioOpticaldefaultJ/ApJS/234/24/table6*Source photometry at 7" resolutionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameField identifier (galaxy nuclei or extranuclear HII regions)meta.id;obs.fieldcharm_Name[a-h] Source identifier (blank if only one source in the field)meta.code.multipcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainl_S33Limit flag on S33meta.code.errorcharS33[0.03/36.6] VLA 33GHz flux densitymJyphot.flux.density;em.mm.30-50GHzfloate_S33[0.01/1.1]? Uncertainty in S33mJystat.errorfloatnullablel_fHaLimit flag on fHameta.code.errorcharfHa[0.01/7.5]? H{alpha} flux; 1e-13 ergs/cm^2^/s1e-16W.m**-2phot.flux;em.line.Halphafloatnullablee_fHa[0/1.5]? Uncertainty in fHa1e-16W.m**-2stat.errorfloatnullablef24[0.3/2161] Spitzer/MIPS 24um band flux densitymJyphot.flux.density;em.IR.15-30umfloate_f24[0.02/108.1] Uncertainty in f24mJystat.errorfloatrG[0/24] Galactocentric radiuskpcphys.size.radius;pos.galactocentricfloatJ/ApJS/234/24/table1Galaxy properties and nuclear source positionsNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainTypeMorphological type (1)src.morph.typecharDist[3/30.6] Redshift-independent distance (2)Mpcpos.distancefloatNucTypeNuclear type based on optical spectroscopy (3)meta.notecharf_NucType[*] *: nuclear type taken in table 4 of Ho+ (1997, J/ApJS/112/315)meta.codecharD25a[1/29] Diameter (major axis) D_25_ (1)arcminphys.angSizefloatD25b[0.9/26] Diameter (minor axis) D_25_ (1)arcminphys.angSizefloatInc[21/83] Inclinationdegsrc.orbital.inclinationintPA[10/173] Positions angle (1)degpos.posAngintf_PA[d] d: PA taken from Jarrett+ (2003AJ....125..525J)meta.codecharSFRSDisplay the nuclear source photometry from Murphy+, 2012, J/ApJ/761/97meta.ref.urlintnullableNsNumber of sources in table 5 (full 33GHz resolution) in this fieldmeta.numberintnullableNs7Number of sources in table 6 (FWHM of 7") in this fieldmeta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharJ/ApJS/234/24/table2Extranuclear source positionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameExtranuclear source identifiermeta.id;meta.maincharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainSFRSDisplay the extranuclear source photometry from Murphy+, 2012, J/ApJ/761/97meta.ref.urlintnullableNsNumber of sources in table 5 (full 33GHz resolution) in this fieldmeta.numberintnullableNs7Number of sources in table 6 (FWHM of 7") in this fieldmeta.numberintnullableJ/ApJS/234/24/table5Source photometry (full resolution)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameField identifier (galaxy nuclei or extranuclear HII regions)meta.id;obs.fieldcharm_Name[A-N] Source identifier (blank if only one source in the field)meta.code.multipcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainl_S33Limit flag on S33meta.code.errorcharS33[0.03/73.8] VLA 33GHz flux densitymJyphot.flux.density;em.mm.30-50GHzfloate_S33[0.01/2.3]? Uncertainty in S33mJystat.errorfloatnullablel_fHaLimit flag on fHameta.code.errorcharfHa[0.02/26]? H{alpha} flux; 1e-13ergs/cm^2^/s1e-16W.m**-2phot.flux;em.line.Halphafloatnullablee_fHa[0.01/5.2]? Uncertainty in fHa1e-16W.m**-2stat.errorfloatnullablerG[0.01/24] Galactocentric radiuskpcphys.size.radius;pos.galactocentricfloat