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Session 73 - Gravitational Lensing.
Display session, Wednesday, January 15
Metropolitan Ballroom,
Galaxy cluster mass distributions are potentially useful probes of Ømega_0 and the nature of the dark matter. Large clusters will distort the observed shapes of background galaxies through gravitational lensing allowing the measurement of the cluster mass distributions. In this poster we describe weak statistical lensing measurements of the most luminous X-ray cluster known, RXJ1347.5-1145 at z=0.45. We detect a shear signal in the background galaxies at a signal-to-noise ratio of 7.5 in the radial range 120 \le r \le 1360 (h^-1 kpc). A mass map of the cluster reveals an 11\sigma peak in the cluster mass distribution consistent with the position of the central dominant galaxy and a 3 \sigma evidence for the presence of a subcluster at a projected radius of 1.3 - 1.7 h^-1 Mpc from the cluster center. In this poster we will discuss the cluster mass distribution in detail and make quantitative comparisons with the galaxy distribution and the X-ray emission.
