J/ApJ/862/110ivo://CDS.VizieR/J/ApJ/862/110doi:10.26093/cds/vizier.18620110CDSSchruba A.Bialy S.Sternberg A.2019-08-23T08:32:03Z2019-08-22T14:41:18ZCDS support team

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

cds-question@unistra.frgalaxieschemical-abundancesinterstellar-mediumWe investigate the metallicity dependence of HI surface densities in star-forming regions along many lines of sight within 70 nearby galaxies, probing kiloparsec to 50pc scales. We employ HI, SFR, stellar mass, and metallicity (gradient) measurements from the literature, spanning a wide range (5dex) in stellar and gas mass and (1.6dex) in metallicity. We consider metallicities as observed, or rescaled to match the mass-metallicity relation determined for SDSS galaxies. At intermediate to high metallicities (0.3-2 times solar), we find that the HI surface densities saturate at sufficiently large total gas surface density. The maximal HI columns vary approximately inversely with metallicity, and show little variation with spatial resolution, galactocentric radius, or among galaxies. In the central parts of massive spiral galaxies, the HI gas is depressed by factors of ~2. The observed behavior is naturally reproduced by metallicity dependent shielding theories for the HI-to-H2 transitions in star-forming galaxies. We show that the inverse scaling of the maximal HI columns with metallicity suggests that the area filling fraction of atomic-molecular complexes in galaxies is of the order of unity, and weakly dependent on metallicity.2018ApJ...862..110Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/862/110CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006)J/ApJS/173/185 : GALEX UV atlas of nearby galaxies (Gil de Paz+, 2007)J/AJ/136/2782 : Star formation efficiency in nearby galaxies (Leroy+, 2008)J/AJ/136/2563 : HI Nearby Galaxy Survey, THINGS (Walter+, 2008)J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)J/AJ/140/1194 : FUV/HI relations in nearby galaxies (Bigiel+, 2010)J/ApJ/715/506 : Aromatic inventory of the local volume (Marble+, 2010)J/ApJS/190/233 : Spectroscopy & abund. of SINGS galaxies (Moustakas+, 2010)J/MNRAS/415/32 : COLD GASS survey (Saintonge+, 2011)J/AJ/143/133 : Dwarf galaxies from the ALFALFA survey (Huang+, 2012)J/AJ/144/134 : LITTLE THINGS survey of nearby dwarf galaxies (Hunter+, 2012)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/A+A/539/A143 : Nearby B-stars stellar parameters and abund. (Nieva+, 2012)J/ApJ/745/173 : UV absorption sight lines of LMC and SMC (Welty+, 2012)J/ApJ/765/140 : Stacked spectra of SDSS star forming gal. (Andrews+, 2013)J/MNRAS/445/899 : LVL SEDs and physical properties (Cook+, 2014)J/AJ/147/131 : Abundances of nearby late-type galaxies. I. (Pilyugin+, 2014)J/A+A/582/A121 : Dust properties in galaxies (Remy-Ruyer+, 2015)J/ApJ/830/4 : HII region abundances in NGC 5457 (M101) (Croxall+, 2016)J/A+A/590/A27 : CO spectra of Virgo cluster galaxies (Grossi,+, 2016)J/A+A/595/A62 : CALIFA galaxies O/H and N/O slopes (Perez-Montero+, 2016)J/ApJ/824/29 : ATLASGAL clumps with IRAS & MALT90 data (Stephens+, 2016)J/ApJ/835/278 : Molecular clouds in the dwarf galaxy NGC6822 (Schruba+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/862/110https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/862/110http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/862/110https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/862/110https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/862/110http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/862/110GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/862/110/table1 (properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/862/110/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/862/110/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/862/110/table1?GETtext/xml+votable180.050000true189.667083332.76638890.0055555555555555566/2320 3389 4511 5287 5492 5584 5607 5715 5751 5978 6399 6560 7241 7523 7602 7607 7624 7743 7769 7799 7878 7956 7970 8028 8908 10659 10762 10841 10856 10881 10910 10911 10970 11019 11027 11041 11120 11143 11434 11933 11961 13522 15592 16441 16701 17165 18041 18398 19990 22495 26271 26858 27030 27351 27514 27555 28015 28035 28123 28149 28167 28510 28610 28631 28636 29699 38390 38846 43881https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/862/110?format=asciidefaultJ/ApJ/862/110/table1propertiesSimbadNameSimbad column added by the CDSmeta.idcharNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDist[0.7/19.2] DistanceMpcpos.distance;pos.heliocentricfloatr_DistReference for distance (1)meta.ref;pos.framecharMstar[6.5/11.2]? log10 stellar masslog(solMass)phys.massfloatnullabler_MstarReference for stellar mass (1)meta.ref;pos.framecharMetal[7.3/8.7] Metallicity measurement (12+log(O/H))phys.abundfloate_Metal[0.01/0.3] Uncertainty in metallicitystat.error;phys.abund.Zfloatf_MetalType of metallicity (2)meta.codecharr_MetalReference for metallicity (1)meta.ref;pos.framecharDel(O/H)[0/0.3] Metallicity rescaling value (3)stat.fit.paramfloatGrad[-0.9/0.05]? Metallicity gradient (in units of dex/R_25_)arith.grad;phys.abundfloatnullablee_Grad[0/0.5]? Uncertainty in metallicity gradientstat.errorfloatnullabler_Grad? Reference for metallicity gradient (1)meta.ref;pos.framecharTCatDisplay data from the THINGS catalogs (Walter+, 2008, J/AJ/136/2563 and Hunter+, 2012, J/AJ/144/134)meta.ref.urlintnullableNEDNED 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.main