Quintessence with a constant equation of state in hyperbolic universes
arXiv:astro-ph/0212471 · doi:10.1103/PhysRevD.67.123511
Abstract
Quintessence models leading to a constant equation of state are studied in hyperbolic universes. General properties of the quintessence potentials V(phi) are discussed, and for some special cases also the exact analytic expressions for these potentials are derived. It is shown that the observed angular power spectrum of the cosmic microwave background (CMB) is in excellent agreement with some of the quintessence models even in cases with negative curvature. It is emphasized that due to a (w_phi, Omega_phi, Omega_c)-degeneracy a universe with negative spatial curvature cannot be excluded.
15 pages, a version with figures in color can be obtained at http://www.physik.uni-ulm.de/theo/qc/ulm-tp/tp02-13.ps.gz
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- Constraints on the cosmic equation of state: age conflict versus phantom energy. Age-redshift relations in an accelerated universe
- Observational constraints on dark energy cosmological model parameters
- The variance of the CMB temperature gradient: a new signature of a multiply connected Universe
- Quintessence and the Curvature of the Universe after WMAP
- Quintessence and (Anti-)Chaplygin Gas in Loop Quantum Cosmology
- Flat Cosmology with Coupled Matter and Dark Energies
- Tilted non-spatially-flat inflation