Strong and Weak Lensing Constraints on Galaxy Mass Distribution

Abstract

Gravitational Lensing is a UNIQUE tool to constrain the mass distribution of collapsed structures, this is particularly true for galaxies, either on a case by case basis using multiple images of background sources (such as quasars), or statistically using the so called galaxy-galaxy lensing technique. First, I will present the lensing theory, and then discuss the various methods applied to current observations. Finally, I will review the bright future prospects of galaxy lensing that will benefit of the development of high resolution, large, wide and deep (lensing) surveys.

to appear in the proceedings of the Yale 2001 Cosmology Workshop on the Shapes of Galaxies and Their Halos (8 pages)

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• VLA 1.4 GHz Catalogs of the Abell 370 and Abell 2390 Cluster Fields
• Analytic Solutions for Navarro--Frenk--White Lens Models for Low Characteristic Convergences