Lyα-emitting galaxies at <i>z</i>=3.1

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dc.contributor.authorGawiser, Eric
dc.contributor.authorFrancke, Harold
dc.contributor.authorLai, Kamson
dc.contributor.authorSchawinski, Kevin
dc.contributor.authorGronwall, Caryl
dc.contributor.authorCiardullo, Robin
dc.contributor.authorQuadri, Ryan
dc.contributor.authorOrsi, Alvaro
dc.contributor.authorBarrientos, Felipe
dc.contributor.authorBlanc, Guillermo A.
dc.contributor.authorFazio, Giovanni
dc.contributor.authorFeldmeier, John J.
dc.contributor.authorHuang, Jia-Sheng
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorLira, Paulina
dc.contributor.authorPadilla, Nelson
dc.contributor.authorTaylor, Edward N.
dc.contributor.authorTreister, Ezequiel
dc.contributor.authorUrry, C. Megan
dc.contributor.authorVan Dokkum, Pieter G.
dc.contributor.authorVirani, Shanil N.
dc.date.accessioned2025-01-21T01:05:16Z
dc.date.available2025-01-21T01:05:16Z
dc.date.issued2007
dc.description.abstractWe studied the clustering properties and multiwavelength spectral energy distributions of a complete sample of 162 Ly alpha- emitting (LAE) galaxies at z similar or equal to 3: 1 discovered in deep narrowband MUSYC imaging of the Extended Chandra Deep Field-South. LAEs were selected to have observed frame equivalent widths >80 angstrom and emission line fluxes >1.5 x 10(-17) ergs cm(-2) s(-1). Only 1% of our LAE sample appears to host AGNs. The LAEs exhibit a moderate spatial correlation length of r(0) = 3.6(-1.0)(+0.8) Mpc, corresponding to a bias factor b = 1.7(-0.4)(+0.3), which implies median dark matter halo masses of log(10)M(med) = 10.9(-0.9)(+0.5) M-circle dot. Comparing the number density of LAEs, 1.5 +/- 0.3 x 10(-3) Mpc(-3), with the number density of these halos finds a mean halo occupation similar to 1%-10%. The evolution of galaxy bias with redshift implies that most z 3: 1 LAEs evolve into present-day galaxies with L < 2.5L*, whereas other z > 3 galaxy populations typically evolve into more massive galaxies. Halo merger trees show that z 0 descendants occupy halos with a wide range of masses, with a median descendant mass close to that of L*. Only 30% of LAEs have sufficient stellar mass (>similar to 3 x 10(9) M-circle dot) to yield detections in deep Spitzer IRAC imaging. A two-population SED fit to the stacked UBVRIzJK+[3.6, 4.5, 5.6, 8.0] mu m fluxes of the IRAC-undetected objects finds that the typical LAE has low stellar mass (1.0(-0.4)(+0.6) 10(9) M-circle dot), moderate star formation rate (2 +/- 1 M-circle dot yr(-1)), a young component age of 20(-10)(+30) Myr, and little dust (A(V) < 0: 2). The bestfit model has 20% of the mass in the young stellar component, but models without evolved stars are also allowed.
dc.fuente.origenWOS
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95875
dc.identifier.wosidWOS:000253331400023
dc.issue.numero1
dc.language.isoen
dc.pagina.final284
dc.pagina.inicio278
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectgalaxies : evolution
dc.subjectgalaxies : formation
dc.subjectgalaxies : high redshift
dc.subjectlarge-scale structure of universe
dc.titleLyα-emitting galaxies at <i>z</i>=3.1
dc.typeartículo
dc.volumen671
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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