623 citations · 11.8k across the 149 of their papers we have counts for
8 papers · 2 filters
Investigating the Origins of Dark Matter Halo Density Profiles
Liliya L. R. Williams, Arif Babul, Julianne J. Dalcanton
Although high-resolution N-body simulations make robust empirical predictions for the density distribution within cold dark matter halos, these studies have yielded little physical…
The Satellite-substructure Connection
James E. Taylor, Arif Babul, Joseph Silk
We describe our recent attempts to model substructure in dark matter halos down to very small masses, using a semi-analytic model of halo formation. The results suggest that numeri…
On the Intracluster Medium in Cooling Flow & Non-Cooling Flow Clusters
Arif Babul, Ian G. McCarthy, Greg B. Poole
Recent X-ray observations have highlighted clusters that lack entropy cores. At first glance, these results appear to invalidate the preheated ICM models. We show that a self-consi…
The nature and space density of fossil groups of galaxies
L. R. Jones, T. J. Ponman, A. Horton +3
We describe the properties of a sample of galaxy groups with very unusual distributions of galaxy luminosities. The most extreme example has an X-ray luminosity similar to that of…
The SZ Effect Signature of Excess Entropy in Distant, Massive Clusters
Ian G. McCarthy, Gilbert P. Holder, Arif Babul +1
Studies of cluster X-ray scaling relations have led to suggestions that non-gravitational processes, e.g., radiative cooling and/or "preheating", have significantly modified the en…
On the Relationship between Cooling Flows and Bubbles
Ian G. McCarthy, Arif Babul, Neal Katz +1
A common feature of the X-ray bubbles observed in Chandra images of some "cooling flow" clusters is that they appear to be surrounded by bright, cool shells. Temperature maps of a…
Cluster Sunyaev-Zeldovich Effect Scaling Relations
Ian G. McCarthy, Arif Babul, Gilbert P. Holder +1
X-ray observations of an "entropy floor" in nearby groups and clusters of galaxies offer evidence that important non-gravitational processes, such as radiative cooling and/or "preh…
The Evolution of Substructure in Galaxy, Group and Cluster Haloes I: Basic Dynamics
James E. Taylor, Arif Babul
The hierarchical mergers that form the haloes of dark matter surrounding galaxies, groups and clusters are not entirely efficient, leaving substantial amounts of dense substructure…