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9 The current understanding of astrophysical magnetic fields is reviewed, focusing on their generation and maintenance by turbulence. In the astrophysical context this generation is usually explainedâ€¦ (More)

- Axel Brandenburg
- 2000

A numerical model of isotropic homogeneous turbulence with helical forcing is investigated. The resulting flow, which is essentially the prototype of the Î± dynamo of mean-field dynamo theory,â€¦ (More)

The validity of a closure called the minimal tau approximation (MTA), is tested in the context of dynamo theory, wherein triple correlations are assumed to provide relaxation of the turbulentâ€¦ (More)

Reaction-diffusion equations based on a polymerization model are solved to simulate the spreading of hypothetic left and right-handed life forms on the Earthâ€™s surface. The equations exhibitâ€¦ (More)

- Axel Brandenburg
- 2004

Arguments for and against the widely accepted picture of a solar dynamo being seated in the tachocline are reviewed and alternative ideas concerning dynamos operating in the bulk of the convectionâ€¦ (More)

- Wolfgang Dobler, N. E. L. Haugen, Tarek A Yousef, Axel Brandenburg
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2003

At numerical resolutions around 512(3) and above, three-dimensional energy spectra from turbulence simulations begin to show noticeably shallower spectra than k(-5/3) near the dissipation wave numberâ€¦ (More)

- Axel Brandenburg
- 2009

Recent analytical and computational advances in the theory of large-scale dynamos are reviewed. The importance of the magnetic helicity constraint is apparent even without invoking mean-field theory.â€¦ (More)

- Axel Brandenburg, Anja C. Andersen, Susanne HÃ¶fner, Martin Nilsson
- Origins of Life and Evolution of Biospheres
- 2005

The stability and conservation properties of a recently proposed polymerization model are studied. The achiral (racemic) solution is linearly unstable once the relevant control parameter (here theâ€¦ (More)

We discuss current observational and theoretical knowledge of magnetic fields, especially the large-scale structure in the disks and halos of spiral galaxies. Among other topics, we consider theâ€¦ (More)

- Axel Brandenburg, Harry J. Lehto, Kirsi M Lehto
- Astrobiology
- 2007

A recently proposed model of non-autocatalytic reactions in dipeptide formation that leads to spontaneous symmetry breaking and homochirality was examined. The model is governed by activation,â€¦ (More)