J/A+A/576/A33ivo://CDS.VizieR/J/A+A/576/A33doi:10.26093/cds/vizier.35760033CDSHunt L.K.Draine B.T.Bianchi S.Gordon K.D.Aniano G.Calzetti D.,Dale D.A.Helou G.Hinz J.L.Kennicutt R.C.Roussel H.Wilson C.D.,Bolatto A.Boquien M.Croxall K.V.Galametz M.Gil de Paz A.Koda J.,Munoz-Mateos J.C.Sandstrom K.M.Sauvage M.Vigroux L.Zibett S.2017-12-22T05:33:15Z2015-03-20T07:03:11ZCDS support team

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

cds-question@unistra.frgalaxiesspectral-energy-distributionPhysical conditions of the interstellar medium in galaxies are closely linked to the ambient radiation field and the heating of dust grains. In order to characterize dust properties in galaxies over a wide range of physical conditions, we present here the radial surface brightness profiles of the entire sample of 61 galaxies from Key Insights into Nearby Galaxies: Far-Infrared Survey with Herschel (KINGFISH). The main goal of our work is the characterization of the grain emissivities, dust temperatures, and interstellar radiation fields responsible for heating the dust. After fitting the dust and stellar radial profiles with exponential functions, we fit the far-infrared spectral energy distribution (SED) in each annular region with single-temperature modified black bodies using both variable (MBBV) and fixed (MBBF) emissivity indices {beta}, as well as with physically motivated dust models. Results show that while most SED parameters decrease with radius, the emissivity index {beta} also decreases with radius in some galaxies, but in others is increasing, or rising in the inner regions and falling in the outer ones. Despite the fixed grain emissivity (average {beta}~2.1) of the physically-motivated models, they are well able to accommodate flat spectral slopes with {beta}<=1. We find that flatter slopes ({beta}<=1.5) are associated with cooler temperatures, contrary to what would be expected from the usual T_dust_-{beta} degeneracy. This trend is related to variations in Umin since {beta} and U_min_ are very closely linked over the entire range in U_min_ sampled by the KINGFISH galaxies: low U_min_ is associated with flat {beta}<=1. Both these results strongly suggest that the low apparent {beta} values (flat slopes) in MBBV fits are caused by temperature mixing along the line-of-sight, rather than by intrinsic variations in grain properties.2015A&A...576A..33Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/576/A33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/715/506 : Aromatic inventory of the local volume (Marble+, 2010)J/ApJS/190/233 : Spectroscopy + abundances of SINGS galaxies (Moustakas+ 2010)J/ApJ/703/1569 : Radial distribution in SINGS galaxies (Munoz-Mateos+, 2009)J/ApJ/757/52 : UV and IR observations for SINGS galaxies. I. (Mao+, 2012)J/ApJ/774/136 : X-ray observations of SINGS galaxies (Tzanavaris+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/576/A33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/576/A33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/576/A33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/576/A33https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/576/A33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/576/A33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/576/A33/table1 (KINGFISH galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/576/A33/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/576/A33/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/576/A33/table1?GETtext/xml+votable180.050000true128.5366.1816670.0055555555555555566/764 2320 3506 4447 5181 5492 5715 5751 5799 7241 7602 7604 7607 7624 7769 7799 7956 8106 10761 10841 10856 10901 11434 11457 11933 11961 13522 15592 16441 17594 17612 18398 23178 25083 25946 26271 27030 27514 27555 27830 27861 27914 27937 28015 28035 28123 28149 28167 28496 34404 34471 34493 34534 35993 36194 36241 36974 38390 43420 43845https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/576/A33?format=asciiOpticaldefaultJ/A+A/576/A33/table1KINGFISH galaxy sampleSimbadNameSimbad column added by the CDSmeta.idcharTT[-5/10] T-typemeta.noteintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharprimaryNrNumber of different radiuses observed for this galaxymeta.numberintSED3.5--500{mu}m SED plot of the galaxy for different radiusesmeta.ref.urlcharProfProfile of the galaxy for different mid/far-IR wavelengthsmeta.ref.urlcharMTypeHubble morphological typesrc.morph.typecharDist[3/31] Distance (1)Mpcpos.distance;pos.heliocentricfloatAbund[7.5/8.8] 12+log(O/H) abundancephys.abundfloatr_Abund[d] Reference for Abund (3)meta.ref;pos.framechare_Abundrms uncertainty on Abundstat.errorfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainamaj[0.9/29] Major axis diameter (2)arcminphys.angSizefloatbmin[0.6/27] Minor axis diameter (2)arcminphys.angSizefloatPA[0/180] Position angle (E from N)degpos.posAngintr_PAReference for PA (4)meta.ref;pos.framechari[0/90] Inclination anglesrc.orbital.inclination;pos.posAngintr_iReference for i (4)meta.ref;pos.framecharJ/A+A/576/A33/prosedRadial profile SED surface brightnessrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy designationmeta.id;meta.maincharRow[1/72] Row number in a given galaxy (index of r-value)meta.idintr[18/1296] Galactocentric radius of row centerarcsecphys.angSize;pos.galactocentricdoublelambda[3.5/504] Central wavelength of filter for SEDumem.wl.central;instr.filterfloatSuBrRadial brightness levelMJy/srphot.mag.sbdoublee_SuBrRadial brightness uncertaintyMJy/srstat.errordouble