Mathematics – Logic
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12313e&link_type=abstract
HST Proposal ID #12313. Cycle 18
Mathematics
Logic
Scientific paper
We propose multi-passband observations with HST/ACS {F435W, F606W, and F814W} and moderately deep X-ray observations with Chandra/ACIS-I of the massive cluster merger MACSJ0358.8-2955 at z=0.434. The combination of existing HST/ACS and Chandra/ACIS-I snapshots shows strong evidence for a segregation of luminous and dark matter in a linear cluster merger, making this system a prime candidate for a quantitative study of the properties of dark matter. We have already identified and spectroscopically confirmed two sets of strongly lensed multiple-image systems. The resulting tentative model of the mass distribution shows a highly elongated critical line and further supports a linear, post-collision geometry that may enable a third, independent measurement of the self-interaction cross section of dark matter from cluster mergers. The colour and morphological information provided by the proposed HST/ACS observations will allow us to unambiguously identify additional multiple-image systems to refine our mass model, and to obtain further independent constraints on the mass profile from a weak-lensing analysis. The proposed Chandra/ACIS-I will provide complementary information on the intra-cluster gas, most importantly an accurate mapping of its distribution, but also spatially resolved gas temperatures. In combination with groundbased spectroscopy {underway}, these observations will permit us to reconstruct the three-dimensional geometry and dynamics of this merger and to perform an independent test of the results on the existence and properties of dark matter obtained for the Bullet Cluster and MACSJ0025.4-1222.;
No associations
LandOfFree
An in-depth study of dark matter in the massive cluster merger MACSJ0358.8-2955 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 An in-depth study of dark matter in the massive cluster merger MACSJ0358.8-2955, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An in-depth study of dark matter in the massive cluster merger MACSJ0358.8-2955 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1786121