The turbulent dynamo as an instability in a noisy medium

Details The turbulent dynamo as an instability in a noisy medium The turbulent dynamo as an instability in a noisy medium

2004-04-05

arxiv.org/abs/astro-ph/0404108v2

European Physical Journal B 44 (2005) 395

Astronomy and Astrophysics

Astrophysics

6 pages

Scientific paper

10.1140/epjb/e2005-00138-y

We study an example of instability in presence of a multiplicative noise, namely the spontaneous generation of a magnetic field in a turbulent medium. This so-called turbulent dynamo problem remains challenging, experimentally and theoretically. In this field, the prevailing theory is the Mean-Field Dynamo (Krause and R\"{a}dler, 1980) where the dynamo effect is monitored by the mean magnetic field (other possible choices would be the energy, flux,...). In recent years, it has been shown on stochastic oscillators that this type of approach could be misleading. In this paper, we develop a stochastic description of the turbulent dynamo effect which permits us to define unambiguously a threshold for the dynamo effect, namely by globally analyzing the probability density function of the magnetic field instead of a given moment.

Affiliated with

Also associated with

No associations

Rating

The turbulent dynamo as an instability in a noisy medium does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The turbulent dynamo as an instability in a noisy medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The turbulent dynamo as an instability in a noisy medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-600438