Weak Lensing Predictions at Intermediate Scales

Details Weak Lensing Predictions at Intermediate Scales Weak Lensing Predictions at Intermediate Scales

2000-09-26

arxiv.org/abs/astro-ph/0009426v1

Mon.Not.Roy.Astron.Soc. 322 (2001) 918

Astronomy and Astrophysics

Astrophysics

7 pages, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04241.x

As pointed out in previous studies, the measurement of the skewness of the convergence field $\kappa$ will be useful in breaking the degeneracy among the cosmological parameters constrained from weak lensing observations. The combination of shot noise and finite survey volume implies that such a measurement is likely to be done in a range of intermediate scales ($0.5'$ to 20') where neither perturbation theory nor the hierarchical ansatz apply. Here we explore the behavior of the skewness of $\kappa$ at these intermediate scales, based on results for the non-linear evolution of the mass bispectrum. We combined different ray-tracing simulations to test our predictions, and we find that our calculations describe accurately the transition from the weakly non-linear to the strongly non-linear regime. We show that the single lens-plane approximation remains accurate even in the non-linear regime, and we explicitly calculate the corrections to this approximation. We also discuss the prospects of measuring the skewness in upcoming weak lensing surveys.

Affiliated with

Also associated with

No associations

Rating

Weak Lensing Predictions at Intermediate Scales 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 Weak Lensing Predictions at Intermediate Scales, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Lensing Predictions at Intermediate Scales will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-631403