Patterns in the weak shear 3-point correlation function

Details Patterns in the weak shear 3-point correlation function Patterns in the weak shear 3-point correlation function

2002-01-03

arxiv.org/abs/astro-ph/0201029v2

Astron.Astrophys. 397 (2003) 405-414

Astronomy and Astrophysics

Astrophysics

9 pages; revised version with improved presentation of the calculations. Accepted in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20021567

We explore the scale and angular dependence of the cosmic shear three-point correlation function. The shear field is found to have a much more complex three-point function than the convergence field, but it also exhibits specific motifs which draw signatures of gravitational lensing. Exact shear patterns are inferred analytically for some geometrical shear triplets configurations, when simple interpretations can be derived. A more complete description of their geometrical properties has then been carried out from ray-tracing numerical simulations and simple models. These patterns reveal typical features that can be utilized for non-gaussian signal detection in cosmic shear surveys. We test the robustness of these properties against complex noise statistics and non-trivial survey topologies. From these conclusive checks, we predict that the VIRMOS-DESCART survey should allow a detection of a non-gaussian signal with a comfortable significance for a low matter density Universe.

Affiliated with

Also associated with

No associations

Rating

Patterns in the weak shear 3-point correlation function 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 Patterns in the weak shear 3-point correlation function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Patterns in the weak shear 3-point correlation function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-521013