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Mapping Dark Matter Near Galaxy Clusters

Published online by Cambridge University Press:  25 May 2016

J.A. Tyson
J.A. Tyson*
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974 USA

Abstract

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Weak gravitational lensing can provide a direct measure of mass overdensity on scales of kpc to several Mpc. The total mass and light distribution in a survey of 32 clusters of galaxies is reviewed. The mass is derived from apodized inversion of thousands of weak lensing arclets in deep CCD shift-and-stare exposures to uniform faint surface brightness in two colors. Rest frame V band mass-to-light ratios of several hundred h solar are found.

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