Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure

Details Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure

2003-11-18

arxiv.org/abs/astro-ph/0311431v1

Phys.Rev. D69 (2004) 043002

Astronomy and Astrophysics

Astrophysics

16 pages, 7 figures, to appear in Phys. rev. D

Scientific paper

10.1103/PhysRevD.69.043002

We work in the framework of an inflationary cold dark matter universe with cosmological constant, in which the cosmological inhomogeneities are considered as gravitational lenses for the CMB photons. This lensing deforms the angular distribution of the CMB maps in such a way that the induced deformations are not Gaussian. Our main goal is the estimation of the deviations with respect to Gaussianity appeared in the distribution of deformations. In the new approach used in this paper, matter is evolved with a particle-mesh N-body code and, then, an useful ray-tracing technique designed to calculate the correlations of the lens deformations induced by nonlinear structures is applied. Our approach is described in detail and tested. Various correlations are estimated at an appropriate angular scale. The resulting values point out both deviations with respect to Gaussian statistics and a low level of correlation in the lens deformations.

Affiliated with

Also associated with

No associations

Rating

Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure 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 Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-Gaussian Signatures in the Lens Deformations of the CMB Sky. A New Ray-Tracing Procedure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-339489