An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in the solar wind
| Autor: | Constantino Ferro Fontan, Silvina Ponce Dawson |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Physics
Partial differential equation Differential equation Astronomy and Astrophysics Magnetohydrodynamic turbulence Power law Classical mechanics Distribution function Space and Planetary Science Statistical physics Soliton Perturbation theory Magnetohydrodynamics Nonlinear Sciences::Pattern Formation and Solitons |
| Zdroj: | The Astrophysical Journal. 348:761 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/168285 |
| Popis: | Two statistical models of Alfven solitons are compared whose evolution is described by the one-dimensional derivative nonlinear Schroedinger (DNLS) equation, contrasting their predictions with solar wind observations. Both distribution functions give the same mean number of solitons. One of the distribution functions follows an exponential law with soliton energy and the other follows a power law; the latter gives better results than the former. Within these models, the variation of the observed spectra with the heliocentric distance can be explained. This variation is related to the radial dependence of the mean level of modulation instability in the medium. 47 refs. |
| Databáze: | OpenAIRE |
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