Massive Halos in Millennium Gas Simulations: Multivariate Scaling Relations (2009)
Stanek, R., Rasia, E., Evrard, A. E., Pearce, F., Gazzola, L.
The joint likelihood of observable cluster signals reflects the astrophysical evolution of the coupled baryonic and dark matter components in massive halos, and its knowledge will enhance...
The Effect of Gas Physics on the Halo Mass Function (2008)
Stanek, R., Rudd, D., Evrard, A. E.
Cosmological tests based on cluster counts require accurate calibration of the space density of massive halos, but most calibrations to date have ignored complex gas physics associated with halo...
The L_X--M relation of Clusters of Galaxies (2008)
Rykoff, E. S., Evrard, A. E., McKay, T. A., Becker, M. R., Johnston, D. E., Koester, B. P., ...
We present a new measurement of the scaling relation between X-ray luminosity and total mass for 17,000 galaxy clusters in the maxBCG cluster sample. Stacking sub-samples within fixed ranges of...
Effects of Selection and Covariance on X-ray Scaling Relations of Galaxy Clusters (2007)
Nord, B., Stanek, R., Rasia, E., Evrard, A. E.
We explore how the behavior of galaxy cluster scaling relations are affected by flux-limited selection biases and intrinsic covariance among observable properties. Our models presume log-normal...
Red Sequence Cluster Finding in the Millennium Simulation (2007)
Cohn, J. D., Evrard, A. E., White, M., Croton, D., Ellingson, E.
We investigate halo mass selection properties of red-sequence cluster finders using galaxy populations of the Millennium Simulation (MS). A clear red sequence exists for MS galaxies in massive halos...
Evrard, A. E., Bialek, J., Busha, M., White, M., Habib, S., Heitmann, K., ...
We present a precise estimate of the bulk virial scaling relation of halos formed via hierarchical clustering in an ensemble of simulated cold dark matter cosmologies. The result is insensitive to...
The X-Ray Luminosity--Mass Relation for Local Clusters of Galaxies (2006)
Stanek, R., Evrard, A. E., Böhringer, H., Schuecker, P., Nord, B.
We investigate the relationship between soft \xray luminosity and mass for low redshift clusters of galaxies by comparing observed number counts to expectations of $\Lambda$CDM cosmologies. We use a...
The X-ray luminosity-mass relation for local clusters of galaxies (2006)
Stanek, R., Evrard, A. E., Böhringer, H., Schuecker, P., Nord, B.
The X-ray luminosity-mass relation for local clusters of galaxies (2006)
Stanek, R., Evrard, A. E., Böhringer, H., Schuecker, P., Nord, B.
Shapes and Alignments of Galaxy Cluster Halos (2004)
We present distribution functions and spatial correlations of the shapes of dark matter halos derived from Hubble Volume simulations of a LambdaCDM universe. We measure both position and velocity...
Evrard, A. E., MacFarland, T. J., Couchman, H. M. P., Colberg, J. M., Yoshida, N., White, S. D. M., ...
We use gigaparticle N-body simulations to study galaxy cluster populations in Hubble volumes of LambdaCDM (Omega(m) = 0.3, Omega(Lambda) = 0.7) and tauCDM (Omega(m) = 1) world models. Mapping past...
Evrard, A. E., MacFarland, T. J., Couchman, H. M. P., Colberg, J. M., Yoshida, N., White, S. D. M., ...
We use giga-particle N-body simulations to study galaxy cluster populations in Hubble Volumes of LCDM (Omega_m=0.3, Omega_Lambda=0.7) and tCDM (Omega_m=1) world models. Mapping past light-cones of...
The mass function of dark matter haloes. (2001)
Jenkins, A., Frenk, C. S., White, S. D. M., Colberg, J. M., Cole, S., Evrard, A. E., ...
We combine data from a number of N-body simulations to predict the abundance of dark haloes in cold dark matter (CDM) universes over more than four orders of magnitude in mass. A comparison of...
The mass function of dark matter haloes (2001)
Jenkins, A., Frenk, C. S., White, S. D. M., Colberg, J. M., Cole, S., Evrard, A. E., ...
We combine data from a number of N-body simulations to predict the abundance of dark haloes in cold dark matter (CDM) universes over more than four orders of magnitude in mass. A comparison of...
Simulations of Deep Pencil-Beam Redshift Surveys (2000)
Yoshida, N., Colberg, J., White, S. D. M., Evrard, A. E., MacFarland, T. J., Couchman, H. M. P., ...
We create mock pencil-beam redshift surveys from very large cosmological $N$-body simulations of two Cold Dark Matter cosmogonies, an Einstein-de Sitter model ($\tau$CDM) and a flat model with...
Public Release of N-body simulation and related data by the Virgo consortium (2000)
Frenk, C. S., Colberg, J. M., Couchman, H. M. P., Efstathiou, G., Evrard, A. E., Jenkins, A., ...
We are making available on the WWW a selection of the archived data from N-body simulations carried out by the Virgo consortium and related groups. This currently includes: (i) time-slice, lightcone...
Mass function of dark matter halos (2000)
Jenkins, A., Frenk, C. S., White, S. D. M., Colberg, J. M., Cole, S., Evrard, A. E., ...
We combine data from a number of N-body simulations to predict the abundance of dark halos in Cold Dark Matter universes over more than 4 orders of magnitude in mass. A comparison of different...
Clustering of Galaxy Clusters in CDM Universes (2000)
Colberg, J. M., White, S. D. M., Yoshida, N., MacFarland, T. J., Jenkins, A., Frenk, C. S., ...
We use very large cosmological N--body simulations to obtain accurate predictions for the two-point correlations and power spectra of mass-limited samples of galaxy clusters. We consider two...
Frenk, C. S., White, S. D. M., Bode, P., Bond, J. R., Bryan, G. L., Cen, R., ...
We have simulated the formation of an X-ray cluster in a cold dark matter universe using 12 different codes. The codes span the range of numerical techniques and implementations currently in use,...
The Effects of Clumping and Substructure on ICM Mass Measurements (1999)
Mathiesen, B., Evrard, A. E., Mohr, J. J.
We examine an ensemble of 48 simulated clusters to determine the effects of small-scale density fluctuations and large-scale substructure on X-ray measurements of the intracluster medium (ICM) mass....
A Multiphase Model for the Intracluster Medium (1999)
Nagai, D., Sulkanen, M. E., Evrard, A. E.
Constraints on the clustered mass density \Omega_m of the universe derived from the mean intracluster gas fraction of X-ray clusters may be biased by a single-phase assumption for the thermodynamic...
Frenk White Bryan, C. S. Frenk, P. Bode, J. R. Bond, G. L. Bryan, ...
We have simulated the formation of an X-ray cluster in a cold dark matter universe using 12 different codes. The codes span the range of numerical techniques and implementations currently in use,...
Constraints on \Omega_0 and Cluster Evolution Using the ROSAT LogN-LogS (1997)
We examine the likelihoods of different cosmological models and cluster evolutionary histories by comparing semi-analytical predictions of X-ray cluster number counts to observational data from the...
GALAXY DYNAMICS IN CLUSTERS (1995)
Frenk, C. S., Evrard, A. E., White, S. D. M., Summers, FJ
We use high resolution simulations to study the formation and distribution of galaxies within a cluster which forms hierarchically. We follow both dark matter and baryonic gas which is subject to...
COSMOLOGICAL CONSTRAINTS FROM CLUSTER X-RAY MORPHOLOGIES (1995)
Mohr, J. J., Evrard, A. E., Fabricant, D. G., Geller, M. J.
We use a representative sample of 65 galaxy clusters observed with the Einstein IPC to constrain the range of cluster X-ray morphologies. We develop and apply quantitative and reproducible measures...