J/ApJ/920/122ivo://CDS.VizieR/J/ApJ/920/122doi:10.26093/cds/vizier.19200122CDSDavis D.Gebhardt K.Mentuch Cooper E.Chisholm J.Ciardullo R.,Farrow D.J.Finkelstein S.L.Gronwall C.Gawiser E.Hill G.J.,Hopp U.Jeong D.Landriau M.Liu C.Lujan Niemeyer M.Schneider D.P.,Snigula J.Tuttle S.2024-11-07T20:10:23Z2024-02-29T08:11:05ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyultraviolet-astronomyredshiftedQuestions as to what drove the bulk reionization of the universe, how that reionization proceeded, and how the hard ionizing radiation reached the intergalactic medium remain open and debated. Observations probing that epoch are severely hampered by the increasing amounts of neutral gas with increasing redshift, so a small, but growing, number of experiments are targeting star-forming galaxies (z~3) as proxies. However, these studies, while providing fantastic detail, are time intensive, contain relatively few targets, and can suffer from selection biases. As a complementary alternative, we investigate whether stacking the already vast (and growing) numbers of low- resolution ({Delta}{lambda}/{lambda}=800) Ly{alpha}-emitting (LAE) galaxy spectra from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) can be used to measure ionizing photons (rest-frame 880-910{AA}) escaping their galaxy hosts. As a blind survey, HETDEX avoids the biases from continuum-selected galaxies, and its planned 540deg^2^ coverage promotes the statistical power of large numbers. In this paper, we confirm the feasibility of Lyman continuum detection by carefully selecting a sample of 214 high-redshift (z~3) LAEs from a subset of HETDEX observations, stacking their spectra and measuring a >~3{sigma} detection of 0.10{mu}Jy rest-frame Lyman continuum emission, uncorrected for attenuation in the intergalactic medium, over the full sample stack (3.0<z<3.5 and -22.0<~MUV<~-19.0).2021ApJ...920..122Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/122CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/612/L93 : Candidates of z~5.5-7 galaxies in the HST-UDF (Yan+, 2004)J/ApJ/667/79 : Ly{alpha} emission-line galaxies at z=3.1 (Gronwall+, 2007)J/ApJS/192/5 : Emission-line galaxies from HETDEX pilot survey (Adams+, 2011)J/ApJ/803/34 : z~4-10 galaxies from HST legacy fields (Bouwens+, 2015)J/ApJ/810/71 : UV mag of candidate galaxies at 3~<z~<8.5 (Finkelstein+, 2015)J/ApJ/869/123 : Keck Lyman continuum spectroscopic survey (Steidel+, 2018)J/A+A/641/A118 : Mean rest-UV spectra of Lya emitters at z>3 (Feltre+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/920/122https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/920/122http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/920/122https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/920/122https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/920/122http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/920/122GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/920/122/table1 (Candidate LAE galaxies for this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/920/122/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/920/122/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/920/122/table1?GETtext/xml+votable180.050000true168.85351.81220.0055555555555555565/2685 2779 6/5620-5621 5623-5626 5919 5955-5957 5960 5962-5964 5968 5984 10711 10716 10726 10735 10747-10748 10975 10983 10991 10995 10998-11001 11004 11059-11061 11064-11066 11068 11071 11076-11077 11083-11084 11086 11088 11095 11099-11102 11113 11115 11122-11123 11128 11139 11141 11145-11146 11152 11159 11164-11166 11177 11179-11182 11184-11185 11201-11202 11311 11314-11315 11318 11320 11324 11338 11396 11398 11402 11407 11410-11411 11416 11425 11429-11430 11433-11436 11776 11778https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/920/122?format=asciiUVdefaultJ/ApJ/920/122/table1Candidate LAE galaxies for this workSimbadSimbad column added by the CDSmeta.ref.urlcharNameHETDEX Detection Name, JHHMMSS.ss+DDMMSS.smeta.id;meta.maincharRA_ICRS[165/230] Right Ascension (ICRS)degpos.eq.ra;meta.mainDE_ICRS[48/57] Declination, decimal degrees (ICRS)degpos.eq.dec;meta.mainzspec[2.99/3.5] Spectroscopic redshiftsrc.redshiftfloatrmag[23.5/26.5] r-band magnitudemagphot.mag;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_rmag[0.04/2]? Uncertainty in rmag (1)magstat.error;phot.magfloatnullableIDDetection IDmeta.idJ/ApJ/920/122/table2Sub- Stacked SpectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda1[780/1378] Full sample, wavelength0.1nmem.wlfloatflux1[-8.6/60]? Full sample, flux (1)1e-17mW.m**-2phot.flux;em.UVfloatnullablee_flux1[0.4/8]? Full sample, flux uncertainty (1)1e-17mW.m**-2stat.errorfloatnullablelambda2[782/1379]? Brightest 1/3, wavelength0.1nmem.wlfloatnullableflux2[-12/68]? Brightest 1/3, flux (1)1e-17mW.m**-2phot.flux;em.UVdoublenullablee_flux2[0.7/13]? Brightest 1/3, flux uncertainty (1)1e-17mW.m**-2stat.errorfloatnullablelambda3[780/1378] Faintest 2/3, wavelength0.1nmem.wlfloatflux3[-39/56]? Faintest 2/3, flux (1)1e-17mW.m**-2phot.flux;em.UVdoublenullablee_flux3[0.4/13]? Faintest 2/3, flux uncertainty (1)1e-17mW.m**-2stat.errorfloatnullablelambda4[779/1378]? Faintest 1/3, wavelength0.1nmem.wlfloatnullableflux4[-18/54]? Faintest 1/3, flux (1)1e-17mW.m**-2phot.flux;em.UVdoublenullablee_flux4[0.6/21]? Faintest 1/3 flux uncertainty (1)1e-17mW.m**-2stat.errorfloatnullable