Seeded hot dark matter models for large-scale structure

Abstract

view Abstract Citations (19) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Seeded Hot Dark Matter Models for Large-Scale Structure Villumsen, Jens V. ; Scherrer, Robert J. ; Bertschinger, Edmund Abstract We examine a class of models in which the universe is dominated by hot dark matter and density perturbations are generated by randomly distributed relic seed masses, such as primordial black holes or non- topological solitons. For h = 1/2 and {OMEGA}_b_= 0.08, the seed mass m_s_and number density n_s_are chosen to satisfy m^2^_s_ = 7 x 10^16^ M^2^_sun_ Mpc^-3^, in order to produce a pairwise radial velocity dispersion of 300 km s^-1^ on scales of a few Mpc. With this choice of m^2^_s_n_s _the two-point galaxy correlation function is ξ(r) = (r/r_0_)^-1.8^, with r_0_= 5h^-1^ Mpc. This model produces galaxies much earlier than standard hot dark matter, and the high redshift galaxies are strongly clustered. The evolved density distribution is characterized by a smooth distribution of matter in the low-density void regions. These results are independent of n_s _over the regime we have examined. There is no correlation between the number of seed masses and the number of galaxies. The cleanest test of this model is the prediction that high-redshift galaxies will be strongly clustered. Publication: The Astrophysical Journal Pub Date: January 1991 DOI: 10.1086/169599 Bibcode: 1991ApJ...367...37V Keywords: Dark Matter; Galactic Clusters; Galactic Structure; Astronomical Models; Black Holes (Astronomy); Red Shift; Astrophysics; COSMOLOGY; DARK MATTER; GALAXIES: CLUSTERING full text sources ADS | Related Materials (1) Erratum: 1991ApJ...381..601V