Cluster-Galaxy Correlations in CDM Models

Abstract

We study the ability of COBE-normalized CDM models to reproduce observed properties of the distribution of galaxies and clusters using N-body numerical simulations. We analyze the galaxy-galaxy and cluster-galaxy two-point correlation functions, ${\xi }_{gg}$ and ${\xi }_{cg}$, in open (${\Omega }_0=0.4,{\Omega }_{\Lambda }=0,{\sigma }_8=0.75$), and flat (${\Omega }_0=0.3,{\Omega }_{\Lambda }=0.7,{\sigma }_8=1.05$) CDM models which both reproduce the observed abundances of rich clusters of galaxies. To compare models with observations we compute projected cross-correlation functions ${\omega }_{gg}$ and ${\omega }_{cg}$ to derive the corresponding ${\xi }_{gg}$ and ${\xi }_{cg}$. We use target galaxies selected from Las Campanas Redshift Survey, target clusters selected from the APM Cluster Survey and tracer galaxies from the Edinburgh Durham Sky Survey catalog.

13 pages, 6 figures, to appear in: The Astrophysical Journal

References in corpus (2)

• The APM Galaxy Survey:- V. Catalogues of Galaxy Clusters
• The richness dependence of galaxy cluster correlations: Results from a redshift survey of rich APM clusters

Cited by in corpus (3)

• Do clusters contain a large population of dwarf galaxies?
• The APM cluster-galaxy cross-correlation function : Constraints on Omega and galaxy bias
• ARGO CMB Anisotropy Measurement Constraints on Open and Flat-Lambda CDM Cosmogonies