The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations

Details The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations

2010-03-02

arxiv.org/abs/1003.0481v2

JCAP 1007:003,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

44 pages, 8 figures

Scientific paper

10.1088/1475-7516/2010/07/003

This article presents the first computation of the complete bispectrum of the cosmic microwave background temperature anisotropies arising from the evolution of all cosmic fluids up to second order, including neutrinos. Gravitational couplings, electron density fluctuations and the second order Boltzmann equation are fully taken into account. Comparison to limiting cases that appeared previously in the literature are provided. These are regimes for which analytical insights can be given. The final results are expressed in terms of equivalent fNL for different configurations. It is found that for moments up to lmax=2000, the signal generated by non-linear effects is equivalent to fNL~5 for both local-type and equilateral-type primordial non-Gaussianity.

Affiliated with

Also associated with

No associations

Rating

The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations 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 cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-662897