Artículo
Dawson, S.P.; Fontán, C.F. "An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind" (1990) Astrophysical Journal. 348(2):761-777
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Abstract:
We compare two statistical models of Alfvén solitons whose evolution is described by the one-dimensional derivative nonlinear Schrödinger (DNLS) equation, contrasting their predictions with solar wind observations. Both distribution functions give the same mean number of solitons. This confirms a previous calculation of Ponce Dawson and Ferro FontÁn of the number of solitons which evolve from an arbitrary initial condition. 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, we can explain the variation of the observed spectra (spectral index, outer scale, and maximum value) with the heliocentric distance. This variation is related to the radial dependence of the mean level of modulational instability in the medium. Concerning the spectral index, our calculation improves that of Ovenden, Shah, and Schwartz, because an average over the soliton phases is included.
Registro:
| Documento: | Artículo |
| Título: | An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind |
| Autor: | Dawson, S.P.; Fontán, C.F. |
| Filiación: | Inst. de Astron./Fis. del Espacio Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires Fac. de Ciencias Exactas y Naturales, Departamento de Física, Ciudad Universitaria, (1428) Buenos Aires, Argentina Inst. de Astron./Fis. del Espacio, Casilla de Correo 67, Sucursal 28, (1428) Buenos Aires, Argentina |
| Palabras clave: | Hydromagnetics; Sun: solar wind |
| Año: | 1990 |
| Volumen: | 348 |
| Número: | 2 |
| Página de inicio: | 761 |
| Página de fin: | 777 |
| DOI: | http://dx.doi.org/10.1086/168285 |
| Título revista: | Astrophysical Journal |
| Título revista abreviado: | Astrophys. J. |
| ISSN: | 0004637X |
| PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_0004637X_v348_n2_p761_Dawson.pdf |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v348_n2_p761_Dawson |
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Citas:
---------- APA ----------
Dawson, S.P. & Fontán, C.F. (1990) . An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind. Astrophysical Journal, 348(2), 761-777.http://dx.doi.org/10.1086/168285
---------- CHICAGO ----------
Dawson, S.P., Fontán, C.F. "An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind" . Astrophysical Journal 348, no. 2 (1990) : 761-777.http://dx.doi.org/10.1086/168285
---------- MLA ----------
Dawson, S.P., Fontán, C.F. "An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind" . Astrophysical Journal, vol. 348, no. 2, 1990, pp. 761-777.http://dx.doi.org/10.1086/168285
---------- VANCOUVER ----------
Dawson, S.P., Fontán, C.F. An analysis of unidimensional soliton gas models of magnetohydrodynamic turbulence in thf solar wind. Astrophys. J. 1990;348(2):761-777.http://dx.doi.org/10.1086/168285
