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Wednesday, February 28th 2007
4:00 pm:
Physics and Astronomy Colloquium
in 131 Physics
Speaker: Ellen Zweibel, University of Wisconsin
Subject: The Generation and Evolution of Astrophysical Magnetic Fields
Refreshments served in Room 216 Physics at 3:30 p.m.
Despite recent advances in cosmology, we still do not understand how or when magnetic fields originated. After reviewing the evidence, I will discuss one particular scenario in which magnetic fields originate in accretion disks, are amplified by a dynamo, are ejected into the ambient medium in a jet, and eventually become pervasive. Certain aspects of the problem are relevant to the formation of the first stars.
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