3 papers
astro-ph2000
Evolution of Cluster Early-Type Galaxies
P. G. van Dokkum, M. Franx, D. D. Kelson +2
The slow evolution of the M/L ratios, colors, and line strengths of cluster early-type galaxies to z=1 suggests that their stars were formed at very high redshift. At the same time…
astro-ph1999
A High Fraction of Mergers in the cluster MS1054-03 at z=0.83
M. Franx, P. G. van Dokkum, D. G. Fabricant +2
We used the Hubble Space Telescope to take a wide field, multicolor image of the high redshift cluster MS1054-03 at z=0.83. The Keck telescope was used to take 200 redshifts in the…
astro-ph1999
Luminous red mergers in the z=0.83 cluster MS1054-03: Direct evidence for hierarchical formation of massive early-type galaxies
P. G. van Dokkum, M. Franx, D. Fabricant +2
We present results from a morphological study of the distant X-ray cluster MS1054-03 at z=0.83. We have obtained a large, two color HST WFPC2 mosaic of this cluster, and measured r…