623 citations · 11.8k across the 149 of their papers we have counts for
8 papers · 2 filters
An analytic investigation of the scatter in the integrated X-ray properties of galaxy groups and clusters
Michael L. Balogh, Arif Babul, G. Mark Voit +4
(Abridged) We revisit the scaling relationships between the dark matter mass and observed X-ray luminosity and temperature of galaxy clusters and groups in the local Universe. Spec…
Density Profiles of Collisionless Equilibria. I. Spherical Isotropic Systems
Eric I. Barnes, Liliya L. R. Williams, Arif Babul +1
We investigate the connection between collisionless equilibria and the phase-space relation between density and velocity dispersion found in simulations of dark matter halo…
Scalelengths in Dark Matter Halos
E. I. Barnes, L. L. R. Williams, A. Babul +1
We investigate a hypothesis regarding the origin of the scalelength in halos formed in cosmological N-body simulations. This hypothesis can be viewed as an extension of an earlier…
Semi-analytical dark matter halos and the Jeans equation
Crystal G. Austin, Liliya L. R. Williams, Eric I. Barnes +2
Although N-body studies of dark matter halos show that the density profiles, rho(r), are not simple power-laws, the quantity rho/sigma^3, where sigma(r) is the velocity dispersion,…
A Simple and Accurate Model for Intra-Cluster Gas
Jeremiah P. Ostriker, Paul Bode, Arif Babul
Starting with the well-known NFW dark matter halo distribution, we construct a simple polytropic model for the intracluster medium which is in good agreement with high resolution n…
The Effects of Radiative Cooling on the Entropy Distribution of Intracluster Gas
Ian G. McCarthy, Mark A. Fardal, Arif Babul
High resolution X-ray observations indicate that the entropy profiles in the central regions of some massive cooling flow clusters are well approximated by powerlaws. McCarthy and…
Investigating the Andromeda Stream: II. Orbital Fits and Properties of the Progenitor
M. A. Fardal, A. Babul, J. J. Geehan +1
We construct test-particle orbits and simple N-body models that match the properties of the giant stellar stream observed to the south of M31, using the model of M31's potential de…
Investigating the Andromeda Stream: I. Simple Analytic Bulge-Disk-Halo Model for M31
J. J. Geehan, M. A. Fardal, A. Babul +1
This paper is the first in a series which studies interactions between M31 and its satellites, including the origin of the giant southern stream. We construct accurate yet simple a…