Cosmic Background Anisotropies in Cold Dark Matter Cosmology
Abstract
Cosmic microwave background (CMB) anisotropies and density fluctuations are calculated for flat cold dark matter (CDM) models with a wide range of parameters, viz., Ω_{0}, h, and Ω_{B}, for standard recombination and for various epochs of reionization. Tables of the power spectrum of CMB anisotropies in the form of C1 values as a function of l are presented. Although the HarrisonZeldovich initial spectrum is assumed in these tables, we present simple approximations for obtaining the C_{1} values corresponding to a tilted spectrum from those with a HarrisonZeldovich spectrum. Values of σ_{8} are derived for the matter density spectrum, with α(10°), fixed Q_{rmsPS} and COBE Differential Microwave Radiometer (DMR) 2 yr normalizations. Simple modifications of the fitting formula for the density transfer function are given which are applicable for models with high baryon density. By using both numerical results and these fitting formulae, we calculate the relation between α8 and Q_{rmsPS} and find good agreement. In addition, the velocity fields are calculated.
 Publication:

The Astrophysical Journal Supplement Series
 Pub Date:
 October 1995
 DOI:
 10.1086/192220
 arXiv:
 arXiv:astroph/9412025
 Bibcode:
 1995ApJS..100..281S
 Keywords:

 COSMOLOGY: COSMIC MICROWAVE BACKGROUND;
 COSMOLOGY: THEORY;
 COSMOLOGY: DARK MATTER;
 Astrophysics
 EPrint:
 30 pages including 10 figures, uuencoded comressed Postscript. 3 figures are missing. A complete version is available at anonymous ftp site ftp://pac2.berkeley.edu/pub/sugiyama/sugiyama.uu Tables (39pages) are also available at ftp://pac2.berkeley.edu/pub/sugiyama/tables.ps (and tables.tex) Replaced because one new figure is added and some figures are modified