Weak lensing analysis of CL 1358+62
Abstract
We report on the detection of weak gravitational lensing of faint, distant background objects by Cl 1358+62, a rich cluster of galaxies at a redshift of z = 0.33. The observations consist of a multicolor mosaic of 12 WFPC2 pointings of the Hubble Space Telescope (HST). We find a projected mass of (4.4±0.6) × 10 14 M ⊙ within a 1 Mpc aperture, assuming a singular isothermal sphere (σ = 780 ± 50 km/s). We estimate the mass-to-light ratio to be (90 ± 13) h50M ⊙/L V⊙ , consistent with being constant with radius. A two-dimensional reconstruction of the cluster mass surface density shows that the peak of the mass distribution coincides with the peak of the light distribution.
- Publication:
-
New Astronomy Reviews
- Pub Date:
- August 1998
- DOI:
- 10.1016/S1387-6473(98)00035-9
- arXiv:
- arXiv:astro-ph/9711096
- Bibcode:
- 1998NewAR..42..137H
- Keywords:
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- Astrophysics
- E-Print:
- 22 pages, with 21 figures (3 plots omitted). Revised velocity dispersion and M/L. Accepted for publication in the ApJ. Full version available at http://www.astro.rug.nl/~hoekstra/papers.html