Phil Kronberg: Intergalactic CRs and mag. fields

EUD seminar by Phil Kronberg (LANL & U.Toronto) on some of his recent work on intergalactic magnetic fields observed via Faraday rotation. He is using Arecibo & DRAO interferometer to do a low surface brightness, wide-angle survey for intergalactic emission. The first field of the Coma cluster and surroundings shows emission from the same extended region seen in the X-rays.