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Título

The dark side of curvature

AutorBarenboim, Gabriela ; Mena, Olga ; Fernández-Martínez, Enrique ; Verde, Licia
Palabras claveDark energy experiments
Baryon acoustic oscillations
Cosmological parameters from CMBR
Fecha de publicación3-mar-2010
EditorInstitute of Physics Publishing
CitaciónJournal of Cosmology and Astroparticle Physics (3): 8 (2010)
ResumenGeometrical 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 z similar to 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.
Versión del editorhttp://dx.doi.org/ 10.1088/1475-7516/2010/03/008
URIhttp://hdl.handle.net/10261/24333
DOI10.1088/1475-7516/2010/03/008
ISSN1475-7516
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