18.1k citations · 18.6k across the 9 of their papers we have counts for
9 papers
Morphological Fractions of Galaxies in WINGS Clusters: revisiting the Morphology-Density Paradigm
G. Fasano, B. M. Poggianti, D. Bettoni +11
We present the Morphology-Density and Morphology-Radius relations (T-Sigma and T-R, respectively) obtained from the WINGS database of galaxies in nearby clusters. Aiming to achieve…
Studying The Star Formation Histories of Galaxies in Clusters from Composite Spectra
Alan Dressler, Augustus Oemler, Bianca M. Poggianti +5
We have formed ``composite spectra'' by combining the integrated-light spectra of individual galaxies in 8 intermediate-redshift and 12 low-redshift clusters of galaxies. Because t…
Recycling of ghost galaxies: The origin of giant HI ring around NGC 1533
Kenji Bekki, Warrick J. Couch, Emma Ryan-Weber +1
We propose that the giant HI ring recently discovered by HIPASS for S0 galaxy NGC 1533 is formed by unequal-mass merging between gas-rich LSB (low surface brightness: ``ghost'') ga…
Spectrophotometric evolution of spiral galaxies with truncated star formation: An evolutionary link between spirals and S0s in distant clusters
Yasuhiro Shioya, Kenji Bekki, Warrick J. Couch +1
A one-zone chemo-spectro-photometric model is used to investigate the time evolution of disk galaxies whose star formation is truncated, and to determine the dependence of this evo…
A low global star formation rate in the rich galaxy cluster AC114 at z=0.32
Warrick J. Couch, Michael L. Balogh, Richard G. Bower +3
We present the results of a wide-field survey for H-alpha emitting galaxies in the cluster AC114 at z=0.32. Spectra centred on H-alpha at the cluster redshift have been obtained fo…
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
S. Perlmutter, G. Aldering, G. Goldhaber +29
We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discover…