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Profiles of dark haloes: evolution, scatter and environment
- J. Bullock, T. Kolatt, +5 authors A. Dekel
- Physics
- 16 August 1999
We study dark-matter halo density profiles in a high-resolution N-body simulation of aCDM cosmology. Our statistical sample contains �5000 haloes in the range 10 11 10 14 h −1 M⊙ and the resolution…
Erratum: "Chandra Sample of Nearby Relaxed Galaxy Clusters: Mass, Gas Fraction, and Mass-Temperature Relation"
- A. Vikhlinin, A. Kravtsov, +4 authors L. V. Speybroeck
- Physics
- 5 July 2005
We present gas and total mass profiles for 13 low-redshift, relaxed clusters spanning a temperature range 0.7-9 keV, derived from all available Chandra data of sufficient quality. In all clusters,…
A Universal Angular Momentum Profile for Galactic Halos
- J. Bullock, A. Dekel, +4 authors J. Primack
- Physics
- 1 November 2000
We study the angular momentum profiles of a statistical sample of halos drawn from a high-resolution N-body simulation of the ΛCDM cosmology. We find that the cumulative mass distribution of specific…
Toward a halo mass function for precision cosmology: The Limits of universality
- J. Tinker, A. Kravtsov, +5 authors D. Holz
- Physics
- 18 March 2008
We measure the mass function of dark matter halos in a large set of collisionless cosmological simulations of flat ΛCDM cosmology and investigate its evolution at -->z 2. Halos are identified as…
Concentrations of Dark Halos from Their Assembly Histories
- R. Wechsler, J. Bullock, J. Primack, A. Kravtsov, A. Dekel
- Physics
- 9 August 2001
We study the relation between the density profiles of dark matter halos and their mass assembly histories using a statistical sample of halos in a high-resolution N-body simulation of the ΛCDM…
Chandra Cluster Cosmology Project. II. Samples and X-Ray Data Reduction
- A. Vikhlinin, R. Burenin, +8 authors A. Voevodkin
- Physics
- 20 February 2009
We discuss the measurements of the galaxy cluster mass functions at z 0.05 and z 0.5 using high-quality Chandra observations of samples derived from the ROSAT PSPC All-Sky and 400 deg2 surveys. We…
Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
- A. Vikhlinin, A. Kravtsov, +8 authors A. Voevodkin
- Physics
- 20 February 2009
Chandra observations of large samples of galaxy clusters detected in X-rays by ROSAT provide a new, robust determination of the cluster mass functions at low and high redshifts. Statistical and…
WHERE ARE THE MISSING GALACTIC SATELLITES
- A. Klypin, A. Kravtsov, O. Valenzuela, F. Prada
- Physics
- 19 January 1999
According to the hierarchical clustering scenario, galaxies are assembled by merging and accretion of numerous satellites of di†erent sizes and masses. This ongoing process is not 100% efficient in…
THE LARGE-SCALE BIAS OF DARK MATTER HALOS: NUMERICAL CALIBRATION AND MODEL TESTS
- J. Tinker, B. Robertson, +4 authors S. Gottlober
- Physics
- 18 January 2010
We measure the clustering of dark matter halos in a large set of collisionless cosmological simulations of the flatCDM cosmology. Halos are identified using the spherical over density algorithm,…
Effects of Galaxy Formation on Thermodynamics of the Intracluster Medium
- D. Nagai, A. Kravtsov, +6 authors Moscow
- Physics
- 26 March 2007
We present detailed comparisons of the intracluster medium (ICM) in cosmological Eulerian cluster simulations with deep Chandra observations of nearby relaxed clusters. To assess the impact of galaxy…
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