October 22, 1998 CfA Colloquium

Title: Middle-aged Galaxies

Speaker: Roger Blandford

Abstract: This is an interesting time in the study of galaxies. Recent and ongoing redshift surveys are mapping out the local Universe and characterizing the properties of older galaxies like our own. By contrast, the discovery of young galaxies at z ~ 3 is providing insight into the process of galaxy formation and the behavior of young galaxies. The evolutionary link between these two stages is provided by studies of galaxies with redshifts 0.5 < z < 1. Some recent results from galaxy surveys over this redshift interval, which show that galactic history is strongly dependent upon environment will be described and discussed. Difficulties with contemporary cosmogonic theory will be set forth.

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