The Mass Distribution in Clusters of Galaxies from Weak and Strong Lensing

Details The Mass Distribution in Clusters of Galaxies from Weak and Strong Lensing The Mass Distribution in Clusters of Galaxies from Weak and Strong Lensing

1995-09-14

arxiv.org/abs/astro-ph/9509077v1

IAU Symp. 173 (1996) 131

Astronomy and Astrophysics

Astrophysics

6 pages, uuencoded postcript file

Scientific paper

This paper is intended as an introduction to the theory of weak lensing. A review of the inversion formula introduced by Kaiser and Squires is presented. We then prove the formula of the aperture densitometry method in a simple way that allows a clear understanding of where the various terms come from. This is particularly useful to quantitatively measure masses in any region of a lens. We then summarize what has been learned from observations of strong lensing about the dark matter distribution; weak lensing should provide similar information on larger scales in clusters of galaxies.

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