Lyα emission-line galaxies at <i>z</i>=3.1 in the extended Chandra Deep Field-South

Simple item page
dc.contributor.authorGronwall, Caryl
dc.contributor.authorCiardullo, Robin
dc.contributor.authorHickey, Thomas
dc.contributor.authorGawiser, Eric
dc.contributor.authorFeldmeier, John J.
dc.contributor.authorvan Dokkum, Pieter G.
dc.contributor.authorUrry, C. Megan
dc.contributor.authorHerrera, David
dc.contributor.authorLehmer, Bret D.
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorOrsi, Alvaro
dc.contributor.authorMarchesini, Danilo
dc.contributor.authorBlanc, Guillermo A.
dc.contributor.authorFrancke, Harold
dc.contributor.authorLira, Paulina
dc.contributor.authorTreister, Ezequiel
dc.date.accessioned2025-01-21T01:05:24Z
dc.date.available2025-01-21T01:05:24Z
dc.date.issued2007
dc.description.abstractWe describe the results of an extremely deep, 0.28 deg(2) survey for z = 3.1 Ly alpha emission-line galaxies in the Extended Chandra Deep Field-South. By using a narrowband 5000 angstrom filter and complementary broadband photometry from the MUSYC survey, we identify a statistically complete sample of 162 galaxies with monochromatic fluxes brighter than 1.5 x10(-17) ergs cm(-2) s(-1) and observer's frame equivalent widths greater than 80 angstrom. We show that the equivalent width distribution of these objects follows an exponential with a rest-frame scale length of w(0) = 76(-8)(+11) angstrom In addition, we show that in the emission line, the luminosity function of Ly alpha galaxies has a faint-end power-law slope of -1.49(-0.34)(+0.45) a bright-end cutoff of log L-* = 42.64(-0.15)(,)(+0.26) and a space density above our detection thresholds of (1.46 +/- 0.12); 10(-3) h(70)(3) galaxies Mpc(-3). Finally, by comparing the emission-line and continuum properties of the Ly alpha emitters, we show that the star formation rates derived from Ly alpha are similar to 3 times lower than those inferred from the rest-frame UV continuum. We use this offset to deduce the existence of a small amount of internal extinction within the host galaxies. This extinction, coupled with the lack of extremely high equivalent width emitters, argues that these galaxies are not primordial Population III objects, although they are young and relatively chemically unevolved.
dc.fuente.origenWOS
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95911
dc.identifier.wosidWOS:000249455900008
dc.issue.numero1
dc.language.isoen
dc.pagina.final91
dc.pagina.inicio79
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectcosmology : observations
dc.subjectgalaxies : formation
dc.subjectgalaxies : high-redshift
dc.subjectgalaxies : luminosity function, mass function
dc.titleLyα emission-line galaxies at <i>z</i>=3.1 in the extended Chandra Deep Field-South
dc.typeartículo
dc.volumen667
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas