CAIRNS: The Cluster and Infall Region Nearby Survey. I. Redshifts and Mass Profiles
- K. Rines, M. Geller, A. Diaferio, Michael J. Kurtz, T. Jarrett
- Physics
- 25 June 2003
The CAIRNS (Cluster and Infall Region Nearby Survey) project is a spectroscopic survey of the infall regions surrounding eight nearby, rich, X-ray–luminous clusters of galaxies. We have collected…
CIRS: Cluster Infall Regions in the Sloan Digital Sky Survey. I. Infall Patterns and Mass Profiles
- K. Rines, A. Diaferio
- Physics
- 2 February 2006
We use the Fourth Data Release of the Sloan Digital Sky Survey (SDSS) to test the ubiquity of infall patterns around galaxy clusters and measure cluster mass profiles to large radii. The Cluster and…
Mass estimation in the outer regions of galaxy clusters
- A. Diaferio
- Physics
- 21 June 1999
We present a technique for estimating the mass in the outskirts of galaxy clusters where the usual assumption of dynamical equilibrium is not valid. The method assumes that clusters form through…
Clustering of galaxies in a hierarchical universe — II. Evolution to high redshift
- G. Kauffmann, J. Colberg, A. Diaferio, S. White
- Physics
- 14 September 1998
In hierarchical cosmologies the evolution of galaxy clustering depends both on cosmological quantities such as Ω, Λ and P(k), which determine how collapsed structures – dark matter haloes – form and…
X‐ray properties of galaxy clusters and groups from a cosmological hydrodynamical simulation
- S. Borgani, G. Murante, Bologna
- Physics
- 28 October 2003
We present results on the X-ray properties of clusters and groups of galaxies, extracted from a large cosmological hydrodynamical simulation. We used the TREE+SPH code GADGET to simulate a…
On the efficiency and reliability of cluster mass estimates based on member galaxies
- A. Biviano, G. Murante, S. Borgani, A. Diaferio, K. Dolag, M. Girardi
- Physics
- 5 May 2006
Aims. We study the efficiency and reliability of cluster mass estimators that are based on the projected phase-space distribution of galaxies in a cluster region. Methods. We analyse a data-set of 62…
Non-Gaussian cosmic microwave background temperature fluctuations from peculiar velocities of clusters
- N. Yoshida, R. Sheth, A. Diaferio
- Physics
- 20 April 2001
We use numerical simulations of a (480 Mpc h−1)3 volume to show that the distribution of peak heights in maps of the temperature fluctuations from the kinematic and thermal Sunyaev–Zeldovich (SZ)…
MEASURING THE ULTIMATE HALO MASS OF GALAXY CLUSTERS: REDSHIFTS AND MASS PROFILES FROM THE HECTOSPEC CLUSTER SURVEY (HeCS)
- K. Rines, M. Geller, A. Diaferio, Michael J. Kurtz
- Physics
- 17 September 2012
The infall regions of galaxy clusters represent the largest gravitationally bound structures in a ΛCDM universe. Measuring cluster mass profiles into the infall regions provides an estimate of the…
The spatial and kinematic distributions of cluster galaxies in a ΩCDM universe: comparison with observations
- A. Diaferio, G. Kauffmann, M. Balogh, S. White, D. Schade, E. Ellingson
- Physics
- 24 May 2000
We combine dissipationless N-body simulations and semi-analytic models of galaxy formation to study the spatial and kinematic distributions of cluster galaxies in a ΛCDM cosmology. We investigate how…
Infall Regions of Galaxy Clusters
- A. Diaferio, M. Geller
- Physics
- 8 January 1997
In hierarchical clustering, galaxy clusters accrete mass through the aggregation of smaller systems. Thus, the velocity field of the infall regions of clusters contains significant random motion…
...
...