A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision?

Details A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision? A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision?

2001-11-06

arxiv.org/abs/astro-ph/0111118v2

Astron.Astrophys. 386 (2002) 31-41

Astronomy and Astrophysics

Astrophysics

11 pages, 9 Postscript figures, 1 Jpeg; replaced with clearer, more concise and accepted version, 13 Feb. 2002

Scientific paper

10.1051/0004-6361:20020230

The mass distribution of the rich cluster of galaxies Cl0024+1654 has frequently been used to constrain the nature of dark matter yet a model consistent with all the observational data has been difficult to construct. In this paper we analyse the three-dimensional structure of this cluster using new spectroscopic information on ~300 galaxies within a projected radius of 3 Mpc/h. These data reveal an unusual foreground component of galaxies separated from the main cluster by 3000 km/s. We use numerical simulations to show that a high speed collision along the line of sight between Cl0024+1654 and a second cluster of slightly smaller mass can reproduce the observed peculiar redshift distribution. The collision dramatically alters the internal mass distribution of the bound remnants, creating constant density cores from initially cuspy dark matter profiles and scattering galaxies to large projected radii. Our results can reconcile the inferred mass profile from gravitational lensing with predictions from hierarchical structure formation models, while at the same time resolving the mass discrepancy that results from a comparison between lensing, velocity dispersion and X-ray studies.

Affiliated with

Also associated with

No associations

Rating

A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision? 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 A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-433569