We derive stellar metallicities, light-weighted ages and stellar masses for a magnitude-
limited sample of 175 128 galaxies drawn from the Sloan Digital Sky Survey Data Release …

We measure spectral indexes for 1823 galaxies in the Canadian Network for Observational
Cosmology 1 (CNOC1) sample of 15 X-ray luminous clusters at 0.18< z< 0.55 to investigate …

We examine the origin of clustercentric gradients in the star formation rates and colors of rich
cluster galaxies within the context of a simple model where clusters are built through the …

We present a detailed analysis of the spectroscopic catalog of galaxies in 10 distant clusters
from Dressler et al. We investigate the nature of the different spectral classes defined by …

We have studied the morphology–density relation and morphology–cluster-centric-radius
relation using a volume-limited sample (0.05< z< 0.1, Mr*<− 20.5) of the Sloan Digital Sky …

We present spectroscopic observations of galaxies in the fields of 10 distant clusters for
which we have previously presented deep imaging with WFPC2 on board the Hubble Space …

We exploit recent constraints on the ages and metallicities of early-type galaxies in the
Sloan Digital Sky Survey (SDSS) to gain new insight into the physical origin of two …

We describe a new wide-field Hubble Space Telescope survey of the galaxy cluster Cl
0024+ 16 (z≈ 0.4) consisting of a sparsely sampled mosaic of 39 Wide Field Planetary …

We consider several mechanisms that possibly affect the evolution of disk galaxies in
clusters using analytical models based on a hierarchical clustering scenario. We especially …

We describe the various Hα morphologies of Virgo Cluster and isolated spiral galaxies and
associate the Hα morphologies with the types of environmental interactions that have altered …