Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..22..279p&link_type=abstract
Astrophysics and Space Science, Volume 22, Issue 2, pp.279-291
Astronomy and Astrophysics
Astrophysics
37
Scientific paper
Turbulent diffusion of magnetic field plays an essential role in the generation of magnetic field in most astrophysical bodies. This paper reviews what can be proved, and what can be believed, about the turbulent diffusion of magnetic field. Observations indicate the dissipation of magnetic field at rates that can be understood only in terms of turbulent diffusion. Theory shows that a largescale weak magnetic field diffuses in a turbulent flow in the same way that smoke is mixed throughout the fluid by the turbulence. The small-scale fields (produced from the large-scale field by the turbulence) are limited in their growth by reconnection of field lines at neutral points, so that the turbulent mixing of field and fluid is not halted by them. Altogether, it appears that the mixing of field and fluid in the observed turbulent motions in the Sun and in the Galaxy is unavoidable. Turbulent diffusion causes decay of the general solar fields in a decade or so, and of the galactic field in 108 109 yr. We conclude that continual dynamo action is implied by the observed existence of the fields.
No associations
LandOfFree
The Generation and Dissipation of Solar and Galactic Magnetic Fields 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 Generation and Dissipation of Solar and Galactic Magnetic Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Generation and Dissipation of Solar and Galactic Magnetic Fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1663837