Weak Gravitational Lensing by Dark Clusters

Details Weak Gravitational Lensing by Dark Clusters Weak Gravitational Lensing by Dark Clusters

2002-03-05

arxiv.org/abs/astro-ph/0203061v2

Mon.Not.Roy.Astron.Soc. 337 (2002) 1269

Astronomy and Astrophysics

Astrophysics

18 pages, 11 figures; a few sentences and a figure added, conclusions unchanged, published in MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05977.x

We calculate the abundance of dark-matter concentrations that are sufficiently overdense to produce a detectable weak-gravitational-lensing signal. Most of these overdensities are virialized halos containing identifiable X-ray and/or optical clusters. However, a significant fraction are nonvirialized overdensities still in the process of gravitational collapse--these should produce significantly weaker or no X-ray emission. Our predicted abundance of such dark clusters are consistent with the abundance implied by the Erben et al. (2000) detection of a dark lens. Weak lensing by these nonvirialized objects will need to be considered when determining cosmological parameters with the lens abundance in future weak-lensing surveys. Such weak lenses should also help shed light on the process of cluster formation.

Affiliated with

Also associated with

No associations

Rating

Weak Gravitational Lensing by Dark Clusters 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 Gravitational Lensing by Dark Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Gravitational Lensing by Dark Clusters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-125388