J/ApJS/266/15ivo://CDS.VizieR/J/ApJS/266/15doi:10.26093/cds/vizier.22660015CDSMelinder J.Ostlin G.Hayes M.Rasekh A.Mas-Hesse J.M.Cannon J.M.,Kunth D.Laursen P.Runnholm A.Herenz E.C.Messa M.Schaerer D.,Verhamme A.Rivera-Thorsen T.E.Guaita L.Marquart T.Puschnig J.,Le Reste A.Sandberg A.Freeland E.Bridge J.2023-12-11T19:56:43Z2023-09-19T07:01:16ZCDS support team

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

cds-question@unistra.frgalaxy-radiiredshiftedultraviolet-astronomyline-intensitieshst-photometryextinctionvisible-astronomyWe present Ly{alpha} imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H{alpha} equivalent width criteria, but no constraints on Ly{alpha} luminosity. We employ a pixel stellar continuum fitting code to obtain accurate continuum-subtracted Ly{alpha}, H{alpha}, and H{beta} maps. We find that Ly{alpha} is less concentrated than FUV and optical line emission in almost all galaxies with significant Ly{alpha} emission. We present global measurements of Ly{alpha} and other quantities measured in apertures designed to capture all of the Ly{alpha} emission. We then show how the escape fraction of Ly{alpha} relates to a number of other measured quantities (mass, metallicity, star formation, ionization parameter, and extinction). We find that the escape fraction is strongly anticorrelated with nebular and stellar extinction, weakly anticorrelated with stellar mass, but no conclusive evidence for correlations with other quantities. We show that Ly{alpha} escape fractions are inconsistent with common dust extinction laws, and discuss how a combination of radiative transfer effects and clumpy dust models can help resolve the discrepancies. We present an SFR calibration based on Ly{alpha} luminosity, where the equivalent width of Ly{alpha} is used to correct for nonunity escape fraction, and show that this relation provides a reasonably accurate SFR estimate. We also show stacked growth curves of Ly{alpha} for the galaxies that can be used to find aperture loss fractions at a given physical radius.2023ApJS..266...15Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/266/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/A+AS/91/285 : HII galaxies spectrophotometric catalogue (Terlevich+, 1991)J/AJ/121/169 : Imaging and spectroscopy of Tol 1214-277 (Fricke+, 2001)J/A+A/462/535 : Low-metallicity HII regions and galaxies (Yin+, 2007)J/ApJS/192/5 : Emission-line galaxies from HETDEX pilot survey (Adams+, 2011)J/ApJ/738/136 : LAEs between 0.19<z<1.25 with GALEX grism (Cowie+, 2011)J/A+A/529/A149 : HII regions in low-metallicity galaxies (Guseva+, 2011)J/A+A/561/A89 : Optical spectroscopy of 24 Ly-alpha emitters (Atek+, 2014)J/A+A/587/A78 : LARS VIII. Spatially resolved Ha kinematics (Herenz+, 2016)J/A+A/606/A12 : MUSE-Wide survey: 831 emission line galaxies (Herenz+, 2017)J/A+A/608/A8 : MUSE Hubble Ultra Deep Field Survey. VIII (Leclercq+, 2017)J/ApJ/844/171 : Ly{alpha} profile in 43 Green Pea galaxies (Yang+, 2017)J/MNRAS/477/2817 : Luminous Ly{alpha} emitters at z~2-3 (Sobral+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/266/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/266/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/266/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/266/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/266/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/266/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/266/15/galaxies (characteristics (Table 1), SDSS derived properties (Table 2), Size measurements (Table 4), Global Ly{alpha}, H{alpha}, and FUV measurements (Table 5), Derived properties (Table 6) and HST imaging for individual galaxies (Table 7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/266/15/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/266/15/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/266/15/galaxies?GETtext/xml+votable180.050000true202.183563943.9306950.0055555555555555566/5026 5599 5814 6013 6110 6115 6128 6141 7259 7272 7294 7441 7452 7472 7509 7523 9923 10144 10192 10220 10393 10404 11009 11115 11133 11183 11220 11386 11500 11505 11512 11778 11782 11824 11826 11855 11908 11968 18302 24696 24859 26095 26359https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/266/15?format=asciiUVOpticaldefaultJ/ApJS/266/15/galaxiescharacteristics (Table 1), SDSS derived properties (Table 2), Size measurements (Table 4), Global Ly{alpha}, H{alpha}, and FUV measurements (Table 5), Derived properties (Table 6) and HST imaging for individual galaxies (Table 7)e_Mass[0.01/0.5]? Lower Uncertainty on Mass1e+10solMassstat.error;phys.massfloatnullablee_rpLya[0.01/7.7]? Lower Uncertainty on rpLyakpcstat.errorfloatnullableFlagFlag (11)meta.code.errorcharLFUV[0.1/24.1] FUV Luminosity, 10+40erg/s/cm2/{AA}1e+47W.m**-3phys.luminosity;em.UVfloatE_LFUV[0.002/0.5]? Upper Uncertainty on LFUV1e+47W.m**-3stat.error;stat.maxfloatnullablee_LFUV[0.002/0.5]? Lower Uncertainty on LFUV1e+47W.m**-3stat.errorfloatnullableLHa[0.1/32] H{alpha} luminosity, 10+41erg/s/cm21e+38W.m**-2phys.luminosity;em.line.Halphafloatl_rpLya[>= ] Limit flag on rpLyameta.code.errorcharSimbadNameSimbad column added by the CDSmeta.idcharnullabler_zspecFlag on zspec (1)meta.ref;pos.framechare_log(O/H)[1e-05/0.05] Uncertainty in log(O/H)stat.errordoublef_rtotFlag on rtot (10)meta.codechare_SSFR[0/0.3]? Lower Uncertainty on WLya (G2)solMass.yr**-1.kpc**-2stat.errorfloatnullableMass[0.04/15.3] Mass1e+10solMassphys.massfloatE_Mass[0.01/0.5]? Upper Uncertainty on Mass1e+10solMassstat.error;stat.maxfloatnullableAge[3.29/88] AgeMyrtime.agefloatE_Age[0.4/8.5]? Upper Uncertainty on AgeMyrstat.error;stat.maxfloatnullableNEDNED column added by the CDSmeta.ref.urlcharLEDAmeta.ref.urlchare_Age[0.2/8.5]? Lower Uncertainty on AgeMyrstat.error;time.agefloatnullableE(B-V)s[0.05/0.4] Stellar extinctionmagphot.color.excessfloatE_E(B-V)s[0/0.01]? Upper Uncertainty on E(B-V)s (G2)magstat.error;stat.maxfloatnullablee_E(B-V)s[0/0.01]? Lower Uncertainty on E(B-V)s (G2)magstat.errorfloatnullableE(B-V)n[0/1.2] Nebular extinctionmagphot.color.excessfloatE_E(B-V)n[0/0.2]? Upper Uncertainty on E(B-V)n (G2)magstat.error;stat.maxfloatnullablee_E(B-V)n[0/0.3]? Lower Uncertainty on E(B-V)n (G2)magstat.errorfloatnullableLyaHST ACS/SBC observations of Ly{alpha}meta.code;instr.filtercharHaHST WFC3/UVIS + ACS/WFC observations of H{alpha}meta.code;instr.filtercharHbHST WFC3/UVIS + ACS/WFC observations of H{beta}meta.code;instr.filtercharFUVHST ACS/SBC observations of FUV continuummeta.code;instr.filtercharOptHST WFC3/UVIS + ACS/WFC of UV/Optical continuummeta.code;instr.filtercharPapXIDisplay data from Paper XI (Puschnig+, 2020, J/A+A/644/A10)meta.ref.urlintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNsbNumber of measurements for this galaxy (link to Table 8)meta.numberintnullableIDSample Identifier used in this work (G1)meta.id;meta.maincharprimarySDSSSDSS DR8 identifiers (JHHMMSS.ss+DDMMSS.s)meta.idcharzspec[0.026/0.24] SDSS DR8 spectroscopic redshiftsrc.redshiftfloatEWHa[41/1644] SDSS DR8 H{alpha} equivalent width; in Angstrom units0.1nmspect.line.eqWidth;em.line.Halphaintr_EWHaFlag on EWHa (1)meta.ref;pos.framecharlogLHa[39.8/42.44] SDSS DR8 log of H{alpha} luminosity; in erg/s units1e-07Wphys.luminosity;em.line.HalphafloatlogLfuv[9/11.1] log of GALEX Far-UV luminosity (2)log(solLum)phys.luminosity;em.UVfloatE(B-V)MW[0.006/0.08] Reddening, E(B-V), Milky Way contribution (3)magphot.color.excessfloatONameOther (or complete) name (G1)meta.idcharf_ONamea=Measurements for IRAS 08208+2816 were from SDSS DR12meta.codecharSloanDisplay the online SDSS-DR17 data for the nearest objectmeta.ref.urlcharlogMs[8.34/10.6] log of stellar mass (5)log(solMass)phys.massfloatf_logMs[a] a=From HST SED fitting (LaXs)meta.codecharSFRHa-tot[0.29/36.1] star formation rate, H{alpha} (5)solMass/yrphys.SFR;em.line.HalphafloatE(B-V)Neb[0/0.7] Reddening, E(B-V) (6)magphot.color.excessfloatf_E(B-V)NebFlag on E(B-V)Neb (7)meta.codecharO32[0.34/16.7] O32 ratio (8)phot.flux;arith.ratiofloate_O32[0.0001/0.2] Uncertainty in O32stat.errorfloatlog(O/H)[7.2/8.6] Metallicity, 12+log(O/H) (9)phys.abundfloatf_log(O/H)Flag on log(O/H) (7)meta.codecharl_rtot[>= ] Limit flag on rtotmeta.code.errorcharrtot[3.23/37.62] Total Ly{alpha} aperturekpcphys.size.radiusfloatl_rpFUV[>= ] Limit flag on rpFUVmeta.code.errorcharrpFUV[0.1/10.64] Petrosian radius, FUVkpcphys.size.radius;em.UVfloatE_rpFUV[0/1.4]? Upper Uncertainty on rpFUV (G2)kpcstat.error;stat.maxfloatnullablee_rpFUV[0/0.6]? Lower Uncertainty on rpFUV (G2)kpcstat.errorfloatnullablerpHa[0.4/14.4] Petrosian radius, H{alpha}kpcphys.size.radius;em.line.HalphafloatE_rpHa[0/0.8]? Upper Uncertainty on rpHa (G2)kpcstat.error;stat.maxfloatnullablee_rpHa[0/0.2]? Lower Uncertainty on rpHa (G2)kpcstat.errorfloatnullablerpLya[0.2/28.1] Petrosian radius, Ly{alpha}kpcphys.size.radius;em.line.LyalphafloatE_rpLya[0.018/6.4]? Upper Uncertainty on rpLyakpcstat.error;stat.maxfloatnullableE_LHa[0.006/0.8]? Upper Uncertainty on LHa1e+38W.m**-2stat.error;stat.maxfloatnullablee_LHa[0.006/0.8]? Lower Uncertainty on LHa1e+38W.m**-2stat.errorfloatnullablel_LLya[<= ] Limit flag on LLyameta.code.errorcharLLya[0.06/64] Ly{alpha} luminosity, 10+41erg/s/cm21e+38W.m**-2phys.luminosity;em.UV;em.line.LyalphafloatE_LLya[0.04/5]? Upper Uncertainty on LLya1e+38W.m**-2stat.error;stat.maxfloatnullablee_LLya[0.03/5]? Lower Uncertainty on LLya1e+38W.m**-2stat.errorfloatnullablel_WLya[<= ] Limit flag on WLyameta.code.errorcharWLya[1.27/72] Equivalent width, Ly{alpha}, {AA}0.1nmspect.line.eqWidth;em.line.LyalphafloatE_WLya[0.2/3.5]? Upper Uncertainty on WLya0.1nmstat.error;stat.maxfloatnullablee_WLya[0.2/3.4]? Lower Uncertainty on WLya0.1nmstat.errorfloatnullablel_fesc[<= ] Limit flag on fescmeta.code.errorcharfesc[0.002/0.3] Escape fractionstat.fit.paramfloatE_fesc[0/0.04]? Upper Uncertainty on fesc (G2)stat.error;stat.maxfloatnullablee_fesc[0/0.04]? Lower Uncertainty on fesc (G2)stat.errorfloatnullableSFRHa[0.15/67.1] Star formation rate, H{alpha}solMass/yrphys.SFR;em.line.HalphafloatE_SFRHa[0/0.8]? Upper Uncertainty on SFRHa (G2)solMass/yrstat.error;stat.maxfloatnullablee_SFRHa[0/0.8]? Lower Uncertainty on SFRHa (G2)solMass/yrstat.errorfloatnullableSFRFUV[0.16/65.3] Star formation rate, FUVsolMass/yrphys.SFR;em.UVfloatE_SFRFUV[0/2]? Upper Uncertainty on SFRFUV (G2)solMass/yrstat.error;stat.maxfloatnullablee_SFRFUV[0/2]? Lower Uncertainty on SFRFUV (G2)solMass/yrstat.errorfloatnullablesSFRHa[0.28/110] Specific star formation rate, H{alpha}phys.SFR;em.line.HalphafloatE_sSFRHa[0/7]? Upper Uncertainty on sSFRHa (G2)stat.error;stat.maxfloatnullablee_sSFRHa[0/7]? Lower Uncertainty on sSFRHa (G2)stat.errorfloatnullableSSFR[0.002/8.6] Star formation rate surface densitysolMass.yr**-1.kpc**-2phys.SFRfloatE_SSFR[0/0.3]? Upper Uncertainty on WLya (G2)solMass.yr**-1.kpc**-2stat.error;stat.maxfloatnullableProfInteractive surface brightness profile plotmeta.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.mainJ/ApJS/266/15/table8*Surface brightness, WLya, and f_esc_ profilese_WLya[0.2/9]? Negative error on Lya equivalent width (12)0.1nmstat.errordoublenullablel_SBHaLimit flag for Ha SBmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSample Identifier used in this work (G1)meta.id;meta.maincharE_SBFUV[0.0002/11]? Positive error on FUV surface brightness1e+42J.s**-1.m**-1.kpc**-2stat.error;stat.maxdoublenullableSBHa[0.0003/233] Ha surface brightness1e+33J.s**-1.kpc**-2phot.flux.sb;em.line.Halphadoublee_SBHa[0.0003/4]? Negative error on Ha surface brightness1e+33J.s**-1.kpc**-2stat.errordoublenullableRad[0.1/40.76] Radius (r) of annulus/aperturekpcphys.size.radiusfloatl_SBFUVLimit flag for FUV SBmeta.code.errorcharSBFUV[0.0003/527] FUV surface brightness1e+42J.s**-1.m**-1.kpc**-2phot.flux.sb;em.UVdoublee_SBFUV[0.0002/10]? Negative error on FUV surface brightness1e+42J.s**-1.m**-1.kpc**-2stat.errordoublenullableE_SBHa[0.0003/4]? Positive error on Ha surface brightness1e+33J.s**-1.kpc**-2stat.error;stat.maxdoublenullablel_SBLyaLimit flag for Lya SBmeta.code.errorcharSBLya[0.006/375] Lya surface brightness1e+33J.s**-1.kpc**-2phot.flux.sb;em.line.Lyalphadoublee_SBLya[0.006/57]? Negative error on Lya surface brightness1e+33J.s**-1.kpc**-2stat.errordoublenullableE_SBLya[0.005/65]? Positive error on Lya surface brightness1e+33J.s**-1.kpc**-2stat.error;stat.maxdoublenullablel_WLyaLimit flag for Lya equivalent widthmeta.code.errorcharWLya[0.3/72] Lyman {alpha} equivalent width (12)0.1nmspect.line.eqWidth;em.line.LyalphadoubleE_WLya[0.2/9]? Positive error on Lya equivalent width (12)0.1nmstat.error;stat.maxdoublenullablel_fescLimit flag for Lya escape fractionmeta.code.errorcharfesc[0.0001/38632] Lyman {alpha} escape fraction (12)stat.fit.paramdoublee_fesc[6e-05/0.3]? Negative error on Lya escape fraction (12)stat.errordoublenullableE_fesc[6e-05/0.3]? Positive error on Lya escape fraction (12)stat.error;stat.maxdoublenullable