Servicios Personalizados
Articulo
Indicadores
Links relacionados
- Citado por Google
- Similares en Google
Compartir
South African Journal of Science
versión On-line ISSN 1996-7489
versión impresa ISSN 0038-2353
Resumen
KERMANI, HA y FATEMI, J. Cosmic ray propagation in a fractal galactic medium. S. Afr. j. sci. [online]. 2011, vol.107, n.1-2, pp.1-4. ISSN 1996-7489. http://dx.doi.org/10.4102/sajs.v107i1/2.275.
Simple cosmic ray diffusion in magnetic fields is often discussed in terms of a characteristic scattering mean free path or equivalent diffusion coefficient. This assumes very simple properties of the structure of astrophysical magnetic fields. A better approximation is to assume that the magnetic structure has fractal properties and there is then the possibility of including very short and very long interaction lengths when modelling the propagation. Results of modelling such propagation in a fractal medium are discussed. Values of the propagation parameter (α) less than 2 were obtained and confirm the plausibility of the hypothesis that supernova are the origin of galactic cosmic rays in the energy range below the knee in the spectrum.