 |
| Titel |
Dromion solutions for nonlinear electron acoustic waves in space plasmas |
| VerfasserIn |
S. S. Ghosh, A. Sen, G. S. Lakhina |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 9, no. 5/6 ; Nr. 9, no. 5/6, S.463-475 |
| Datensatznummer |
250006561
|
| Publikation (Nr.) |
 copernicus.org/npg-9-463-2002.pdf |
|
|
|
|
|
| Zusammenfassung |
| Recent high
resolution measurements of POLAR and FAST satellites have revealed
two-dimensional coherent structures in the polar cap boundary layer (PCBL)
region. Since the ion temperature is often observed to be greater than the
electron temperature in this region, electron acoustic waves can exist as
a normal mode of the plasma system. It is shown that the nonlinear
evolution of such waves can be modelled by the coupled Davey-Stewartson I
equations. These equations, which are a generalization of the nonlinear
Schrödinger equation to two dimensions, admit exponentially localized
solutions called dromions. A detailed parametric characterization of the
regions of existence of such solutions is presented in the context of the
PCBL region. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|