1998/01/22 by D. Clowe, Douglas Clowe, N. Kaiser +9
Physics and Astronomy · #Galaxies: Formation, Evolution, Phenomena #Laser-Matter Interactions and Applications #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9801208
11 pages, 2 figures, figures 1 and 2 can be found at http://www.ifa.hawaii.edu/~clowe contains corrected Navarro CDM profiles
arxiv created 1998/01/26 · arxiv updated 2009/12/01
We report the detection of weak gravitational lensing of distant background galaxies by two rich, X-ray luminous clusters of galaxies, MS 1137+66 at z=0.783 and RXJ 1716+67 at z=0.813. We detect a shear signal in each cluster over the radial range 100<r<700 h-1 kpc. Assuming the background galaxies lie in a sheet at z=2, we measure a mass of 2.45*1014 h-1 Msolar and M/Lv = 270 at 500 h-1 kpc radius for MS 1137+66, and a mass of 2.6*1014 h-1 Msolar and M/Lv = 190 for RXJ 1716+67 at the same radius. Both the optical lightmaps and weak lensing massmaps of RXJ 1716+67 show two spatially distinct sub-clusters, as well as a long filamentary structure extending out of the cluster to the northeast. In contrast, MS 1137+66 is an ultra-compact massive cluster in both massmaps and optical lightmaps, and contains a strongly-lensed arc system in the cluster core. These data add to the growing number of massive clusters at z>~0.8.