Abstract

It is now possible to probe stellar populations at large look-back times. The Butcher-Oemler Effect in distant clusters is unambiguous evidence for unexpectedly recent evolution of disk galaxies in dense environments, probably through starbursts induced by interactions. Recent applications of the “red envelope” test at z≲ 1 indicate that some luminous galaxies formed ∼ 10–13 Gyr ago.KeywordsStar FormationStellar PopulationStar Formation RateDisk GalaxyLarge RedshiftThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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