Einstein Ring Constraints on the Shapes of Dark Matter Haloes

Details Einstein Ring Constraints on the Shapes of Dark Matter Haloes Einstein Ring Constraints on the Shapes of Dark Matter Haloes

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iaus..225..237w&link_type=abstract

Gravitational Lensing Impact on Cosmology, IAU Symposium, vol. 225. Edited by Yannick Mellier and Georges Meylan, ISBN 052185196

Physics

Scientific paper

The shape and size of a galaxy-mass dark matter halo can only be measured using a luminous tracer, such as stars, gas or photons. In the last case, gravitational lensing of extended background sources provides many paths for photons to sample the gravitational potential of the lensing galaxy. Multiple independent light paths provide tighter constraints on the mass profile of the lens galaxy than is possible from single path sampled by the lensed images of unresolved sources.

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