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Turbulence and dynamo interlinks

Published online by Cambridge University Press:  18 July 2013

E. M. de Gouveia Dal Pino ,
R. Santos-Lima ,
G. Kowal  and
D. Falceta-Gonçalves
E. M. de Gouveia Dal Pino
Affiliation:
IAG, Universidade de São Paulo, Rua do Matão 1226, São Paulo 05508-090, Brazil email: dalpino@astro.iag.usp.br
R. Santos-Lima
Affiliation:
IAG, Universidade de São Paulo, Rua do Matão 1226, São Paulo 05508-090, Brazil email: dalpino@astro.iag.usp.br
G. Kowal
Affiliation:
IAG, Universidade de São Paulo, Rua do Matão 1226, São Paulo 05508-090, Brazil email: dalpino@astro.iag.usp.br
D. Falceta-Gonçalves
Affiliation:
EACH, Universidade de São Paulo, Rua Arlindo Bettio 1000, São Paulo 03828-000, Brazil
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Abstract

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The role of turbulence in astrophysical environments and its interplay with magnetic fields is still highly debated. In this lecture, we will discuss this issue in the framework of dynamo processes. We will first present a very brief summary of turbulent dynamo theories, then will focus on small scale turbulent dynamos and their particular relevance on the origin and maintenance of magnetic fields in the intra-cluster media (ICM) of galaxies. In these environments, the very low density of the flow requires a collisionless-MHD treatment. We will show the implications of this approach in the turbulent amplification of the magnetic fields in these environments. To finalize, we will also briefly address the connection between MHD turbulence and fast magnetic reconnection and its possible implications in the diffusion of magnetic flux in the dynamo process.

Keywords

MHD turbulencedynamomagnetic reconnectionintracluster medium

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