Abstract
view Abstract Citations (101) References (48) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cluster Correlations for Cold + Hot Dark Matter and Other Models Holtzman, Jon A. ; Primack, Joel R. Abstract Calculations of the autocorrelation function of rich clusters of galaxies are presented for several non-standard variants of cold dark matter (CDM) that have an enhanced power spectrum on large scales compared to "standard" {OMEGA} = 1 CDM. The models considered are (1) cold + hot dark matter (C+HDM) models with {OMEGA}_CDM_+{OMEGA}_v_+{OMEGA}_b_ = 1 (where {OMEGA}_v_, the fraction of the critical density in one or three species of light neutrinos, is comparable to {OMEGA}_CDM_), (2) {OMEGA}_CDM_+{OMEGA}_b_ = 0.2 or 1 (where {OMEGA}_b_, the fraction of critical density in baryonic matter is comparable to {OMEGA}_CDM_) and (3) CDM with a non-Zel'dovich fluctuation spectrum that arises in a particular inflationary model. For models of types (1) and (2), calculations of bulk velocities and microwave background anisotropies have been presented previously; for the third model considered, these are presented here. The cluster correlation functions are calculated using the theory of linear Gaussian fluctuation, and are compared to the currently available data on both spatial (three-dimensional) and angular (two-dimensional) correlations of rich (R >= 1) Abell clusters, including corrections for projection effects. Although "standard"CDM is now in serious conflict with observed cluster correlations, several of the models considered here-in particular, C+HDM models with {OMEGA}_v_ ~ 0.3- are consistent with the available cluster correlation data as well as with other observations, including the COBE microwave background quadrupole anisotropy. Publication: The Astrophysical Journal Pub Date: March 1993 DOI: 10.1086/172375 Bibcode: 1993ApJ...405..428H Keywords: Cosmology; Dark Matter; Galactic Clusters; Neutrinos; Power Spectra; Anisotropy; Cosmic Background Explorer Satellite; Microwave Emission; Radial Velocity; Astrophysics; COSMOLOGY: DARK MATTER; COSMOLOGY: THEORY; GALAXIES: CLUSTERING full text sources ADS |
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