AAS 205th Meeting, 9-13 January 2005
Session 94 From Protogalaxies to Large Surveys: Tracing the Galaxy Evolution
Poster, Wednesday, January 12, 2005, 9:20am-6:30pm, Exhibit Hall

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[94.22] Modelling Protogalactic Collapse and Magnetic Field Evolution with FLASH

C.M. Orban, P.M. Ricker (University of Illinois)

An important outstanding question regarding magnetic fields in spiral galaxies within the framework of the alpha-omega dynamo model is the origin of the initial seed field needed. Several seed field mechanisms have been proposed. The Biermann battery, which generates fields from electron-ion separation effects in protogalactic shocks, is a promising mechanism since it arises naturally during the process of galaxy formation. We present simulations of the Biermann battery in a simple model of protogalactic collapse performed using the adaptive mesh refinement code FLASH to estimate the magnitude of the Biermann battery effect and assess its viability as a seed field generation mechanism.

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.