Constraints on primordial isocurvature perturbations and spatial curvature by Bayesian model selection

J. Valiviita, T. Giannantonio

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Abstract

We present posterior likelihoods and Bayesian model selection analysis for generalized cosmological models where the primordial perturbations include correlated adiabatic and cold dark matter isocurvature components. We perform nested sampling with flat and, for the first time, curved spatial geometries of the Universe, using data from the CMB anisotropies, the Union supernovae (SN) sample, and a combined measurement of the integrated Sachs-Wolfe effect. The CMB alone favors a 3% (positively correlated) isocurvature contribution in both the flat and curved cases. The nonadiabatic contribution to the observed CMB temperature variance is 0
Original languageEnglish
Pages (from-to)123516
Number of pages1
JournalPhysical Review D
Volume80
Issue number12
DOIs
Publication statusPublished - 2009

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