Probing the primordial power spectra with inflationary priors

Details Probing the primordial power spectra with inflationary priors Probing the primordial power spectra with inflationary priors

2009-11-27

arxiv.org/abs/0911.5191v2

JCAP 0902:013, 2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

23 pages, 3 figures, 7 tables, accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2010/02/013

We investigate constraints on power spectra of the primordial curvature and tensor perturbations with priors based on single-field slow-roll inflation models. We stochastically draw the Hubble slow-roll parameters and generate the primordial power spectra using the inflationary flow equations. Using data from recent observations of CMB and several measurements of geometrical distances in the late Universe, Bayesian parameter estimation and model selection are performed for models that have separate priors on the slow-roll parameters. The same analysis is also performed adopting the standard parameterization of the primordial power spectra. We confirmed that the scale-invariant Harrison-Zel'dovich spectrum is disfavored with increased significance from previous studies. While current observations appear to be optimally modeled with some simple models of single-field slow-roll inflation, data is not enough constraining to distinguish these models.

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