Physikalisches Kolloquium: PD Dr. Horst Fichtner (Ruhr-Universität Bochum)

Power Laws in Heliospheric Physics: Evidence for Nonlinear Diffusion, Anomalous Transport and Non-Extensive Entropy?

05.02.2019 ab 16:15

Leibnizstr. 13, 24118 Kiel, Hans-Geiger Hörsaal

Abstract

 

Numerous measurements of space plasmas and energetic particles by many
spacecraft, including the two Voyagers that have by now both left the heliosphere,
have revealed the almost ubiquitous presence of power-law behaviour of distribution
functions both in velocity and in configuration space. Besides being indicative of
acceleration and transport processes, such power laws have been considered as
evidence for `non-standard' physics, particularly for so-called anomalous transport
and for a non-extensive, i.e. non-additive entropy. The talk will demonstrate how
heliospheric physics can contribute to answer related questions and, thus, how it is
related to such fundamental aspects of physics.

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