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Astrophysical magnetic field and nonlinear dynamo theory

- A. Brandenburg, K. Subramanian
- Physics
- 4 May 2004

The invention concerns a new process for the production of 2-alkoxy-4-propen-1-yl phenols of the formula (I), in which R represents the methyl or ethyl radical wherein 2-alkoxy phenols of the formula… Expand

Dynamo-generated Turbulence and Large-Scale Magnetic Fields in a Keplerian Shear Flow

- A. Brandenburg, Å. Nordlund, R. Stein, U. Torkelsson
- Physics
- 1 June 1995

The nonlinear evolution of magnetized Keplerian shear ows is simulated in a local, three-dimensional model, including the eeects of compressibility and stratiication. Supersonic ows are initially… Expand

TIME EVOLUTION OF THE MAGNETIC ACTIVITY CYCLE PERIOD. II. RESULTS FOR AN EXPANDED STELLAR SAMPLE

- S. Saar, A. Brandenburg
- Physics
- 10 October 1999

We further explore nondimensional relationships between the magnetic dynamo cycle period Pcyc, the rotational period Prot, the activity level (as observed in Ca II HK), and other stellar properties… Expand

The inverse cascade and nonlinear alpha-effect in simulations of isotropic helical hydromagnetic turbulence

- A. Brandenburg
- Physics
- 13 June 2000

A numerical model of isotropic homogeneous turbulence with helical forcing is investigated. The resulting flow, which is essentially the prototype of the α2 dynamo of mean field dynamo theory,… Expand

Galactic Magnetism: Recent developments and perspectives

- R. Beck, A. Brandenburg, D. Moss, A. Shukurov, D. Sokoloff
- Physics
- 1 September 1996

▪ Abstract 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… Expand

Simulations of nonhelical hydromagnetic turbulence.

- N. Haugen, A. Brandenburg, W. Dobler
- Physics, Medicine
- Physical review. E, Statistical, nonlinear, and…
- 2 July 2003

TLDR

A supernova-regulated interstellar medium: Simulations of the turbulent multiphase medium

- M. Korpi, A. Brandenburg, A. Shukurov, I. Tuominen, Å. Nordlund
- Physics
- 18 February 1999

The dynamic state of the interstellar medium, heated and stirred by supernovae (SNe), is simulated using a three-dimensional, nonideal MHD model in a domain extended 0.5×0.5 kpc horizontally and 2… Expand

Minimal tau approximation and simulations of the alpha effect

- A. Brandenburg, K. Subramanian
- Physics
- 10 April 2005

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 relaxat ion of the turbulent… Expand

MAGNETIC DIFFUSIVITY TENSOR AND DYNAMO EFFECTS IN ROTATING AND SHEARING TURBULENCE

- A. Brandenburg, K. Radler, M. Rheinhardt, P. Kapyla
- Physics
- 22 October 2007

The turbulent magnetic diffusivity tensor is determined in the presence of rotation or shear. The question is addressed whether dynamo action from the shear-current effect can explain large-scale… Expand

The case for a distributed solar dynamo shaped by near-surface shear

- A. Brandenburg
- Physics
- 15 February 2005

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 convection… Expand

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