The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon

Details The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon

2009-05-12

arxiv.org/abs/0905.1781v2

Physical Review D, Vol.79, No.12, 2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

v2: Journal information added

Scientific paper

10.1103/PhysRevD.79.123006

We show a primordial non-linear "f_NL" term may produce unphysically large CMB anisotropy for a red-tilted primordial power spectrum (n<1), because of coupling to primordial fluctuation on the largest scale. We consider a primordial power spectrum models of a running spectral index, and a transition at very low wavenumbers. We find that only negative running spectral index models are allowed, provided that there is no transition at a low wavenumbers (i.e. k<<1). For models of a constant spectral index, we find log(k_c/k_0)> -184, at 1 sigma level, on the transition scale of sharp cut-off models, using recent CMB and SDSS data.

Affiliated with

Also associated with

No associations

Rating

The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-336866