CDM models with a smooth component
Copyright policy )CDM models with a smooth component
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.
5 pages, RevTeX, with 5 postscript figures included. Minor modifications to reflect version accepted by Phys. Rev. D
- University of Chicago United States
- Fermilab United States
- The Enrico Fermi Institute The University of Chicago United States
- The University of Chicago United States
- National Aeronautics and Space Administration United States
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
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