Evolution of Cluster Early-Type Galaxies

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dc.creatorvan Dokkum, P. G.
dc.creatorFranx, M.
dc.creatorKelson, D. D.
dc.creatorIllingworth, G. D.
dc.creatorFabricant, D.
dc.date2000-12-05
dc.date.accessioned2026-07-07T01:56:52Z
dc.date.available2026-07-07T01:56:52Z
dc.descriptionThe slow evolution of the M/L ratios, colors, and line strengths of cluster early-type galaxies to z=1 suggests that their stars were formed at very high redshift. At the same time, morphological studies of distant clusters indicate significant evolution in the early-type galaxy population. Striking evidence for strong morphological evolution in clusters is the discovery of a large number of red merger systems in the cluster MS 1054-03 at z=0.83. The presence of these mergers is qualitatively consistent with predictions from hierarchical galaxy formation models, and is direct evidence against an early collapse for all early-type galaxies. In most of the mergers there is no evidence for strong star formation. Therefore the mean stellar ages of the merger products will be much older than the ``assembly age'', and do not violate the constraints on the star formation epoch of early-type galaxies imposed by the color-magnitude relation and the Fundamental Plane.
dc.description6 pages, 4 figures. To appear in proceedings of "Deep Fields" meeting (Garching, October 2000)
dc.identifierhttps://arxiv.org/abs/astro-ph/0012090
dc.identifierhttp://arxiv.org/abs/astro-ph/0012090
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/2157
dc.subjectAstrophysics
dc.titleEvolution of Cluster Early-Type Galaxies
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