J/A+A/644/A10ivo://CDS.VizieR/J/A+A/644/A10doi:10.26093/cds/vizier.36440010CDSPuschnig J.Hayes M.Oestlin G.Cannon J.Smirnova-Pinchukova I.,Husemann B.Kunth D.Bridge J.Herenz E.C.Messa M.Oteo I.2024-12-16T20:00:46Z2020-11-24T08:52:30ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyWe study the global dust and (molecular) gas content in the Lyman Alpha Reference Sample (LARS), i.e. 14 local star-forming galaxies. We characterize their interstellar medium and relate newly derived properties to quantities relevant for Ly{alpha} escape. We observed LARS galaxies with Herschel/PACS, SOFIA/FIFI-LS, the IRAM 30m telescope and APEX, targeting far-infrared (FIR) continuum and emission lines of [CII]158um, [OI]63um, [OIII]88um and low-J CO lines. Using Bayesian methods we derive dust model parameters and estimate total gas masses for all LARS galaxies, taking into account a metallicity-dependent gas-to-dust ratio. Star formation rates were estimated from FIR, [CII]158um and [OI]63um luminosities. LARS covers a wide dynamic range in the derived properties, with FIR-based star formation rates from ~0.5-100M_{sun}/yr, gas fractions between ~15-80% and gas depletion times ranging from a few hundred Myr up to more than 10Gyr. The distribution of LARS galaxies in the {SIGMA}_gas_ vs. {SIGMA}_SFR_ (Kennicutt-Schmidt plane) is thus quite heterogeneous. However, we find that LARS galaxies with the longest gas depletion times, i.e. relatively high gas surface densities ({SIGMA}_gas_) and low star formation rate densities ({SIGMA}_SFR_ have by far the highest Ly{alpha} escape fraction. A strong [Math Processing Error]linear relation is found between Ly{alpha} escape fraction and the total gas (HI+H_2_) depletion time. We argue that the Ly{alpha} escape in those galaxies is driven by turbulence in the star-forming gas that shifts the Ly{alpha} photons out of resonance close to the places where they originate. We further report on an extreme [CII]158um excess in LARS 5, corresponding to ~14+/-3% of the FIR luminosity, i.e. the most extreme [CII]-to-FIR ratio observed in a non-AGN galaxy to date.2020A&A...644A..10Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/644/A10CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/644/A10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/644/A10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/644/A10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/644/A10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/644/A10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/644/A10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/644/A10/sources (List of studied sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/644/A10/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/644/A10/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/644/A10/sources?GETtext/xml+votable180.050000true202.18333343.9305280.005555555555555556Cone search capability for table J/A+A/644/A10/list (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/644/A10/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/644/A10/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/644/A10/list?GETtext/xml+votable180.050000true202.1833343.930530.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/644/A106/5026 7259 7272 10393 10404 11009 11782 11908 18302 26095 26359https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/644/A10?format=asciiInfraredMillimeterdefaultJ/A+A/644/A10/sourcesList of studied sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharNameSource namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainsp1Show the spectrummeta.ref.urlcharsp2Show the spectrummeta.ref.urlcharsp3Show the spectrummeta.ref.urlcharsp4Show the spectrummeta.ref.urlcharsp5Show the spectrummeta.ref.urlcharCO1-0Name of the fits spectrum for CO(1-0) line in subdirectory fitsmeta.id;meta.filecharCO2-1Name of the fits spectrum for CO(2-1) line in subdirectory fitsmeta.id;meta.filecharCO3-2Name of the fits spectrum for CO(3-2) line in subdirectory fitsmeta.id;meta.filecharHCN1-0Name of the fits spectrum for HCN(1-0) line in subdirectory fitsmeta.id;meta.filecharHCO+1-0Name of the fits spectrum for HCO+(1-0) line in subdirectory fitsmeta.id;meta.filecharJ/A+A/644/A10/listList of fits spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablebFreqLower value of frequency intervalHzem.freq;stat.mindoubleBFreqUpper value of frequency intervalHzem.freq;stat.maxdoubledFreqFrequency resolutionHzspect.resolutiondoublesizeSize of FITS fileKibytephys.size;meta.fitsintspShow the sepctrummeta.ref.urlcharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar