Gravitational Lens Systems to probe Extragalactic Magnetic Fields
arXiv:0802.4044
Abstract
The Faraday rotation measurements of multiply-imaged gravitational lens systems can be effectively used to probe the existence of large-scale ordered magnetic fields in lensing galaxies and galaxy clusters. The available sample of lens systems appears to suggest the presence of a coherent large-scale magnetic field in giant elliptical galaxies somewhat similar to the spiral galaxies.
11 pages, 1 figure