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Supernova-driven interstellar turbulence and the galactic dynamo

Published online by Cambridge University Press:  08 June 2011

Oliver Gressel ,
Detlef Elstner  and
Günther Rüdiger
Oliver Gressel
Affiliation:
Astronomy Unit, Queen Mary, University of London, Mile End Road, London E1 4NS, UK email: o.gressel@qmul.ac.uk
Detlef Elstner
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany email: elstner@aip.de, gruediger@aip.de
Günther Rüdiger
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany email: elstner@aip.de, gruediger@aip.de
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Abstract

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The fractal shape and multi-component nature of the interstellar medium together with its vast range of dynamical scales provides one of the great challenges in theoretical and numerical astrophysics. Here we will review recent progress in the direct modelling of interstellar hydromagnetic turbulence, focusing on the role of energy injection by supernova explosions. The implications for dynamo theory will be discussed in the context of the mean-field approach.

Results obtained with the test field-method are confronted with analytical predictions and estimates from quasilinear theory. The simulation results enforce the classical understanding of a turbulent Galactic dynamo and, more importantly, yield new quantitative insights. The derived scaling relations enable confident global mean-field modelling.

Keywords

turbulence – ISM: supernova remnantsdynamicsmagnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S274: Advances in Plasma Astrophysics , September 2010 , pp. 348 - 354
Copyright
Copyright © International Astronomical Union 2011

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