Calculation of dynamo coefficients in cosmic-ray driven dynamo experiment

Details Calculation of dynamo coefficients in cosmic-ray driven dynamo experiment Calculation of dynamo coefficients in cosmic-ray driven dynamo experiment

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mpge.conf..171k&link_type=abstract

The Magnetized Plasma in Galaxy Evolution, Proceedings of the conference held in Kraków, Poland, Sept. 27th - Oct. 1st, 2004, Ed

Physics

3

Scientific paper

We present and discuss several new approaches of derivation of the dynamo transport coefficients for the cosmic-ray galactic dynamo experiment by Hanasz et al. (2004), in which we obtained amplification of the large-scale magnetic field on a timescale of 250 Myr. In this paper the standard description of hydromagnetic dynamo by Moffat (1978) is applied, modified and tested in case of the cosmic-ray driven dynamo model. For the first time hatα and hatβ tensors are derived using the multidimensional linear regression and the Levenberg-Marquardt minimization methods. We find that the dynamo coefficients strongly oscillate in the range of ±10 km/s in the considered dynamo experiment.

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