The color bimodality in galaxy clusters since <i>z</i>∼0.9

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dc.contributor.authorLoh, Yeong-Shang
dc.contributor.authorEllingson, E.
dc.contributor.authorYee, H. K. C.
dc.contributor.authorGilbank, D. G.
dc.contributor.authorGladders, M. D.
dc.contributor.authorBarrientos, L. F.
dc.date.accessioned2025-01-21T01:05:03Z
dc.date.available2025-01-21T01:05:03Z
dc.date.issued2008
dc.description.abstractWe present the evolution of the color-magnitude distribution of galaxy clusters from z = 0.45 to z = 0.9 using a homogeneously selected sample of similar to 1000 clusters drawn from the Red-Sequence Cluster Survey (RCS). The red fraction of galaxies decreases as a function of increasing redshift for all clustercentric radii, consistent with the Butcher-Oemler effect, and suggesting that the cluster blue population may be identified with newly infalling galaxies. We also find that the red fraction at the core has a shallower evolution compared with that at the cluster outskirts. Detailed examination of the color distribution of blue galaxies suggests that they have colors consistent with normal spirals and may redden slightly with time. Galaxies of starburst spectral type contribute less than 5% of the increase in the blue population at high redshift, implying that the observed Butcher-Oemler effect is not caused by a unobscured starbursts, but is more consistent with a normal coeval field population.
dc.fuente.origenWOS
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95800
dc.identifier.wosidWOS:000256500800017
dc.issue.numero1
dc.language.isoen
dc.pagina.final223
dc.pagina.inicio214
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectgalaxies : clusters : general
dc.subjectgalaxies : elliptical and lenticular, cD
dc.subjectgalaxies : evolution
dc.subjectmethods : statistical
dc.titleThe color bimodality in galaxy clusters since <i>z</i>∼0.9
dc.typeartículo
dc.volumen680
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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