RädlerFest: Alpha Effect and Beyond

Session

Session 2

14 Feb 2011, 11:00

Wenner-Gren Center, floor 7, Hörsalen (Wenner Gren Center)

253. Understanding the origin of astrophysical magnetic fields

Prof. Eugene Parker

14/02/2011, 11:00

The magnetic field of Earth was the first known example of an astronomical magnetic field. Its form was mapped out by Gilbert (1600) and its origin was attributed to magnetic iron oxide. With the work of Pierre Curie at the end of the 19th century, this explanation became untenable and various atomic effects, e.g. thermoelectricity, were considered. In 1908 Hale showed observationally...

254. The Rädler-effect in supernova-driven turbulence

Dr Oliver Gressel

14/02/2011, 12:00

Supernovae are known to be the dominant energy source for driving turbulence in the interstellar medium. Yet, their effect on magnetic field amplification in spiral galaxies is still poorly understood. Analytical models based on the uncorrelated-ensemble approach predicted that any created field will be expelled from the disk before a significant amplification can occur. By means of...