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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 544505.0, MPI für Physik / MPI für Physik
The dark side of curvature
Authors:Barenboim, G.; Fernandez-Martinez, E.; Mena, O.; Verde, L.
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Geometrical tests such as the combination of the Hubble parameter H(z) and the angular diameter distance d_A(z) can, in principle, break the degeneracy between the dark energy equation of state parameter w(z), and the spatial curvature Omega_k in a direct, model-independent way. In practice, constraints on these quantities achievable from realistic experiments, such as those to be provided by Baryon Acoustic Oscillation (BAO) galaxy surveys in combination with CMB data, can resolve the cosmic confusion between the dark energy equation of state parameter and curvature only statistically and within a parameterized model for w(z). Combining measurements of both H(z) and d_A(z) up to sufficiently high redshifts around z = 2 and employing a parameterization of the redshift evolution of the dark energy equation of state are the keys to resolve the w(z)-Omega_k degeneracy.
Classification / Thesaurus:Astroparticle Physics
Comment of the Author/Creator:18 pages, 9 figures
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2009-168
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:0910.0252
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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