CDM Models with a Smooth Component
Astrophysics
2009-08-18 v2
Abstract
The inflationary prediction of a flat Universe is at odds with current determinations of the matter density (Omega_M~0.2-0.4). This dilemma can be resolved if a smooth component contributes the remaining energy density (Omega_X=1-Omega_M). We parameterize the smooth component by its equation of state, p_X=w rho_X, and show that xCDM with w~-0.6, Omega_M~0.3 and h~0.7 is the best fit to all present cosmological data. Together, the position of the peak in the CMB angular power spectrum and the Type Ia supernova magnitude-redshift diagram provide a crucial test of xCDM.
Keywords
Cite
@article{arxiv.astro-ph/9701138,
title = {CDM Models with a Smooth Component},
author = {Michael Turner and Martin White},
journal= {arXiv preprint arXiv:astro-ph/9701138},
year = {2009}
}
Comments
5 pages, RevTeX, with 5 postscript figures included. Minor modifications to reflect version accepted by Phys. Rev. D