Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-12-17
Astronomy and Astrophysics
Astrophysics
To appear in proceeding of the 37th Herstmonceux conference: HST and the High Redshift Universe
Scientific paper
Surface brightness evolution has been detected in elliptical galaxies (consistent with passive evolution models of old stellar populations) and in disk galaxies (presumably due to enhanced star-formation rates). The rates of evolution in clusters and the field are not measurably different. In addition to this similarity, the high-redshift populations in both environments exhibit a ``blue-excess'' population, increased rates of star formation, and high frequency of peculiar structure. Thus, there are several parallels between evolving cluster and field galaxies and the high-redshift cluster environment will be understood only by comparison with the field population at the same epoch.
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