Some thoughts and some new results about the Butcher-Oemler effect

Abstract

These short notes collect some thoughts about the way Butcher-Oemler-like and evolutionary studies are performed. We emphasize the shortcomings of several overlooked technical ingredients in the above type of studies, with the hope of making a useful cookbook for future works. We also briefly report new results of an ongoing Butcher-Oemler study at intermediate redshift.

Conference proceedings: "The fabulous destiny of galaxies: Bridging past and present", Marseille, June 2005