4 papers
Galaxy Evolution: Internally or Externally Driven?
M. L. Balogh, R. G. Bower
The globally-averaged star formation rate in the Universe has been steadily declining since at least z~1. This may be due either to very local processes operating within the averag…
New Tests of the Cluster Entropy Floor Hypothesis
Ian G. McCarthy, Arif Babul, Michael L. Balogh +1
Recent efforts to account for the observed X-ray luminosity - temperature relation of galaxy clusters has led to suggestions that the ICM has an apparent ``entropy floor'' at or ab…
The Star Formation Histories of Local Galaxies: Continuous or Intermittent?
Guinevere Kauffmann, Stephane Charlot, Michael L. Balogh
We explore a model in which efficient star formation in galaxies is triggered by merging satellites. We show that the merger/interaction rates predicted by hierarchical galaxy form…
Omega_M and the CNOC Surveys
R. G. Carlberg, H. K. C. Yee, H. Lin +15
The CNOC1 cluster survey measures Omega_M via Oort's method, Omega_M= M/L x j/rho_c, where M/L is the field mass-to-light ratio, j is the field luminosity density and rho_c is the…