Cosmology Seminar Announcement Marusa Bradac Stanford " Strong and Weak Lensing United: The puzzle of the most X-ray luminous cluster RXJ1347.5--1145" Date: Thursday, February 10, 2005 Time: 12:10 pm 416 Physics Abstract: Weak and strong gravitational lensing are considered to be one of the most powerful tools to study the mass and the mass distribution of galaxy clusters. Present day applications have been limitted to the inner parts of the clusters for the strong lensing and outer ones for the weak lensing studies. In my talk I will present a novel method for a cluster mass reconstruction, which combines weak and strong lensing information on common scales and can as a consequence very efficiently reconstruct the cluster masss. We apply the method to strong and weak lensing ground-based multi-colour data of RX J1347-1145, the most X-ray luminous cluster known to date, for which mass determinations based on X-ray properties, SZ effect, velocity dispersion measurement, strong and weak lensing have all yielded discrepant results in the past.

E-Mail: marusa@slac.stanford.edu
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