The bright galaxy population of five medium redshift clusters. I. Color-Magnitude Relation, Blue Fractions and Visual Morphology

B. Ascaso, M. Moles, J. A. L. Aguerri +2

Using data of five clusters of galaxies within the redshift range 0.15 $\le$ z $\le$ 0.25, imaged with the Nordic Optical Telescope (NOT) in the central $\approx$ 1 Mpc${}^2$ in ve…