Constraining dark energy with cross-correlated CMB and Large Scale Structure data

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dc.creatorCorasaniti, P. S.
dc.creatorGiannantonio, T.
dc.creatorMelchiorri, A.
dc.date2005-04-05
dc.date2005-06-01
dc.date.accessioned2026-07-07T02:17:23Z
dc.date.available2026-07-07T02:17:23Z
dc.descriptionWe investigate the possibility of constraining dark energy with the Integrated Sachs Wolfe effect recently detected by cross-correlating the WMAP maps with several Large Scale Structure surveys. In agreement with previous works, we found that, under the assumption of a flat universe, the ISW signal is a promising tool for constraining dark energy. Current available data put weak limits on a constant dark energy equation of state w. We also find no constraints on the dark energy sound speed c_e^2. For quintessence-like dark energy (c_e^2=1) we find w<-0.53, while tighter bounds are possible only if the dark energy is ``clustered'' (c_e^2=0), in such a case -1.94<w<-0.63 at 2-sigma. Better measurements of the CMB-LSS correlation will be possible with the next generation of deep redshift surveys. This will provide independent constraints on the dark energy which are alternative to those usually inferred from CMB and SN-Ia data.
dc.description7 pages, 7 figures, extended discussion on baryon density and covariance matrix, matches PRD accepted version
dc.identifierhttps://arxiv.org/abs/astro-ph/0504115
dc.identifierhttp://arxiv.org/abs/astro-ph/0504115
dc.identifierPhys.Rev. D71 (2005) 123521
dc.identifierdoi:10.1103/PhysRevD.71.123521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9156
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleConstraining dark energy with cross-correlated CMB and Large Scale Structure data
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