J/ApJ/920/95ivo://CDS.VizieR/J/ApJ/920/95doi:10.26093/cds/vizier.19200095CDSDu X.Shapley A.E.Topping M.W.Reddy N.A.Sanders R.L.Coil A.L.,Kriek M.,Mobasher B.,Siana B.2024-03-01T09:09:28Z2023-05-12T07:52:49ZCDS support team

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

cds-question@unistra.frgalaxiesstar-forming-regionsinterstellar-mediumspectroscopyultraviolet-astronomyredshiftedtwo-color-diagramsThe complex structure of gas, metals, and dust in the interstellar and circumgalactic medium (ISM and CGM, respectively) in star-forming galaxies can be probed by Ly{alpha} emission and absorption, low-ionization interstellar (LIS) metal absorption, and dust reddening E(B-V). We present a statistical analysis of the mutual correlations among Ly{alpha} equivalent width (EWLy{alpha}), LIS equivalent width (EWLIS), and E(B-V) in a sample of 157 star-forming galaxies at z~2.3. With measurements obtained from individual deep rest-UV spectra and spectral energy distribution modeling, we find that the tightest correlation exists between EWLIS and E(B-V), although correlations among all three parameters are statistically significant. These results signal a direct connection between dust and metal-enriched HI gas and that they are likely cospatial. By comparing our results with the predictions of different ISM/CGM models, we favor a dusty ISM/CGM model where dust resides in HI gas clumps and Ly{alpha} photons escape through the low HI covering fraction/column density intraclump medium. Finally, we investigate the factors that potentially contribute to the intrinsic scatter in the correlations studied in this work, including metallicity, outflow kinematics, Ly{alpha} production efficiency, and slit loss. Specifically, we find evidence that scatter in the relationship between EWLy{alpha} and E(B-V) reflects the variation in the metal-to-H i covering fraction ratio as a function of metallicity and the effects of outflows on the porosity of the ISM/CGM. Future simulations incorporating star formation feedback and the radiative transfer of Ly{alpha} photons will provide key constraints on the spatial distributions of neutral hydrogen gas and dust in the ISM/CGM structure.2021ApJ...920...95Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/95CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/786/59 : SED fitting results of HETDEX pilot survey (Hagen+, 2014)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)J/ApJ/795/165 : Line ratio in z~2-3 galaxies from KBSS-MOSFIRE (Steidel+, 2014)J/ApJ/844/171 : Ly{alpha} profile in 43 Green Pea galaxies (Yang+, 2017)J/ApJ/869/123 : Keck Lyman continuum spectroscopic survey (Steidel+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/920/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/920/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/920/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/920/95https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/920/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/920/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/920/95/table1 (*Galaxy properties and line measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/920/95/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/920/95/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/920/95/table1?GETtext/xml+votable180.050000true214.870163152.77350610.0055555555555555566/11252 11425 27258 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/920/95?format=asciiUVdefaultJ/ApJ/920/95/table1*Galaxy properties and line measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifier; AEGIS, COSMOS or GOODS (N or S)meta.id;obs.fieldcharIDGalaxy identifier within Fieldmeta.id;meta.mainintz[1.65/2.58] Spectroscopic redshiftsrc.redshiftfloatE(B-V)[0.01/0.44] The (B-V) color excessmagphot.color.excessfloate_E(B-V)[0.003/0.05] Uncertainty in E(B-V)magstat.error;phot.color.excessfloatEW-Lya[-47.3/78] Equivalent width of Ly{alpha}0.1nmspect.line.eqWidth;em.line.Lyalphafloate_EW-Lya[0.3/30] Uncertainty in EW-Lya0.1nmstat.error;spect.line.eqWidth;em.line.Lyalphafloatl_EW-LIS[>] The 3{sigma} limit flag on EW-LISmeta.code.error;spect.line.eqWidthcharEW-LIS[-46.5/-1.8] Equivalent width of low-ionization interstellar metal-absorption0.1nmspect.line.eqWidthfloate_EW-LIS[0.2/6]? Uncertainty in EW-LIS0.1nmstat.error;spect.line.eqWidthfloatnullableLISLIS category (1)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullable_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainnullable