Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-10
Astrophys.J.604:596-603,2004
Astronomy and Astrophysics
Astrophysics
8 pages, 4 figure, accepted by ApJ
Scientific paper
10.1086/381970
We present a weak lensing mass reconstruction of the interacting cluster 1E0657-558 in which we detect both the main cluster and a sub-cluster. The sub-cluster is identified as a smaller cluster which has just undergone initial in-fall and pass-through of the primary cluster, and has been previously identified in both optical surveys and X-ray studies. The X-ray gas has been separated from the galaxies by ram-pressure stripping during the pass-through. The detected mass peak is located between the X-ray peak and galaxy concentration, although the position is consistent with the galaxy centroid within the errors of the mass reconstruction. We find that the mass peak for the main cluster is in good spatial agreement with the cluster galaxies and offset from the X-ray halo at 3.4 sigma significance, and determine that the mass-to-light ratios of the two components are consistent with those of relaxed clusters. The observed offsets of the lensing mass peaks from the peaks of the dominant visible mass component (the X-ray gas) directly demonstrate the presence, and dominance, of dark matter in this cluster. This proof of the dark matter existence holds true even under the assumption of modified Newtonian gravity (MOND); from the observed gravitational shear to optical light ratios and mass peak - X-ray gas offsets, the dark matter component in a MOND regime has a total mass which is at least equal to the baryonic mass of the system.
Clowe Douglas
Gonzalez Anthony
Markevitch Maxim
No associations
LandOfFree
Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter 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 mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-460361