Probing the primordial power spectra with inflationary priors
نویسندگان
چکیده
منابع مشابه
Inflationary parameters and primordial perturbation spectra ⋆
I discuss how parameters describing inflation in the very early universe may be related to primordial perturbation spectra. Precision observations of anisotropies in the cosmic microwave background (CMB) such as those provided by the WMAP satellite offer an unprecedented window onto the physics of the very early universe. To theorists exploring speculative models of physics at high energies, th...
متن کاملRecovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior
We introduce a new method for applying an inflationary prior to a cosmological dataset that includes correlations between observables at arbitrary order in the slow roll expansion. The process is based on the inflationary flow equations, and the slow roll parameters appear explicitly in the cosmological parameter set. We contrast our method to other ways of imposing an inflationary prior on a c...
متن کاملRunning from Features: Optimized Evaluation of Inflationary Power Spectra
In models like axion monodromy, temporal features during inflation which are not associated with its ending can produce scalar, and to a lesser extent, tensor power spectra where deviations from scale-free power law spectra can be as large as the deviations from scale invariance itself. Here the standard slow-roll approach breaks down since its parameters evolve on an efolding scale N much smal...
متن کاملThe inflationary prediction for primordial non-gaussianity
We extend the δN formalism so that it gives all of the stochastic properties of the primordial curvature perturbation ζ if the initial field perturbations are gaussian. The calculation requires only the knowledge of some family of unperturbed universes. A formula is given for the normalisation fNL of the bispectrum of ζ, which is the main signal of non-gaussianity. Examples of the use of the fo...
متن کاملNon–Gaussian Primordial Fluctuations in Inflationary Cosmology
We analyze the non–Gaussian primordial fluctuations which are inescapably contributed by scalar fields Φ with vanishing expectation values, 〈Φ〉 = 0, present during inflation in addition to the inflaton field. For simplicity we take Φ to be non–interacting and minimally coupled to gravity. Φ is a Gaussian variable, but the energy density fluctuations contributed by such a field are χ–distributed...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2010
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2010/02/013