EVOLUTION IN THE CONTINUUM MORPHOLOGICAL PROPERTIES OF Lyα-EMITTING GALAXIES FROM <i>z</i>=3.1 TO <i>z</i>=2.1

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dc.contributor.authorBond, Nicholas A.
dc.contributor.authorGawiser, Eric
dc.contributor.authorGuaita, Lucia
dc.contributor.authorPadilla, Nelson
dc.contributor.authorGronwall, Caryl
dc.contributor.authorCiardullo, Robin
dc.contributor.authorLai, Kamson
dc.date.accessioned2025-01-20T23:57:33Z
dc.date.available2025-01-20T23:57:33Z
dc.date.issued2012
dc.description.abstractWe present a rest-frame ultraviolet morphological analysis of 108 z similar or equal to 2.1 Ly alpha emitters (LAEs) in the Extended Chandra Deep Field South and compare it to a similar sample of 171 LAEs at z similar or equal to 3.1. Using Hubble Space Telescope images from the Galaxy Evolution from Morphology and SEDs survey, Great Observatories Origins Deep Survey, and Hubble Ultradeep Field, we measure size and photometric component distributions, where photometric components are defined as distinct clumps of UV-continuum emission. At both redshifts, >80% of LAEs have observed half-light radii < 2 kpc, but the median half-light radius rises from 0.95 +/- 0.04 kpc at z = 3.1 to 1.41 +/- 0.14 kpc at z = 2.1. A similar evolution is seen in the sizes of individual rest-UV components, but there is no evidence for evolution in the number of multi-component systems. In the z = 2.1 sample, we see clear correlations between the size of an LAE and other physical properties derived from its spectral energy distribution (SED). LAEs are found to be larger for galaxies with higher stellar mass, star formation rate, and dust obscuration, but there is no evidence for a trend between equivalent width and half-light radius at either redshift. The presence of these correlations suggests that a wide range of objects are being selected by LAE surveys at z similar or equal to 2, including a significant fraction of objects for which a massive and moderately extended population of old stars underlies the young starburst giving rise to the Ly alpha emission.
dc.fuente.origenWOS
dc.identifier.doi10.1088/0004-637X/753/2/95
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.1088/0004-637X/753/2/95
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95212
dc.identifier.wosidWOS:000305912700002
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectcosmology: observations
dc.subjectgalaxies: formation
dc.subjectgalaxies: high-redshift
dc.subjectgalaxies: structure
dc.titleEVOLUTION IN THE CONTINUUM MORPHOLOGICAL PROPERTIES OF Lyα-EMITTING GALAXIES FROM <i>z</i>=3.1 TO <i>z</i>=2.1
dc.typeartículo
dc.volumen753
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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