Artículo
Abstract:
It is shown that a nonlocal, suprathermal tail originated near the solar corona base dominates the conductive energy flux at distances r ≥: 2 R ⊙ . A nonlocal analytical expression for the electron heat flux in weakly collisional plasmas is derived by solving the Fokker-Planck equation in a narrow, tail energy range. A correction to the anisotropy of the distribution function due to the divergent magnetic field lines was included. This term is essential to recover from the delocalization prescription, in the limit r ≥ 6 R ⊙ , the well-known Hollweg's Ansatz for the "collisionless" heat flux. In the intermediate region 2 R ȯ r ≤ 6 R ⊙ , the nonlocal convolution smoothly interpolates between the classical Spitzer-Härm's formula and the so-called collisionless régime. © 1996. The American Astronomical Society. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Nonlocal heat transport in the solar wind |
| Autor: | Canullo, M.V.; Costa, A.; Ferro-Fontán, C. |
| Filiación: | Instituto de Astronomia Y Fisica Del Espacio (CONICET), Ciudad Universitaria, 1428 Buenos Aires, Argentina Instituto de Fisica Del Plasma, CONICET, Universidad de Buenos Aires, Pab. 1, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
| Palabras clave: | Solar wind; Sun: corona |
| Año: | 1996 |
| Volumen: | 462 |
| Número: | 2 PART I |
| Página de inicio: | 1005 |
| Página de fin: | 1010 |
| DOI: | http://dx.doi.org/10.1086/177214 |
| Título revista: | Astrophysical Journal |
| Título revista abreviado: | Astrophys. J. |
| ISSN: | 0004637X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v462_n2PARTI_p1005_Canullo |
Referencias:
- Abramowitz, M., Stegun, I., (1970) Handbook of Mathematical Functions, , New York: Dover
- Albritton, J.A., Williams, E.A., Bernstein, I.B., Swartz, K.P., (1986) Phys. Rev. Lett., 57, p. 1887. , AWBS
- Gray, J., Kilkenny, S., (1980) Plasma Phys., 22, p. 81
- Hollweg, J.V., (1974) J. Geophys. Res., 79, p. 3845
- (1976) J. Geophys. Res., 81, p. 1649
- (1986) J. Geophys. Res., 91, p. 4111
- Hollweg, J.V., Johnsen, W., (1988) J. Geophys. Res., 93, p. 9547
- Jockers, K., (1970) A&A, 6, p. 219
- Leer, E., Holzer, T.E., Flå, T., (1982) Space Sei. Rev., 33, p. 161
- Luciani, J.F., Mora, P., Pellat, R., (1985) Phys. Fluids, 28, p. 835
- Minotti, F., Ferro-Fontán, C., (1990) Phys. Fluids, 2 B, p. 1725
- Olbert, S., (1983) Solar Wind, 5, p. 149. , ed. M. Neugebauer (NASA Conf. Publ. CP-2280)
- Parker, E.N., (1965) Space Sei. Rev., 4, p. 666
- Perkins, F., (1973) ApJ, 179, p. 637
- Rogers, J.H., De Groot, J.S., Abou-Assaleh, Z., Johnston, T.W., Rosen, M.D., (1989) Phys. Fluids, 1 B, p. 741
- Sanmartin, J.R., Ramirez, J., Fernández-Feria, R., (1990) Phys. Fluids, 2 B, p. 2519
- Sanmartin, J.R., Ramirez, J., Fernández-Feria, R., Minotti, F., (1992) Phys. Fluids, B, 4 (11), p. 3579
- Scudder, J., Olbert, S., (1979) J. Geophys. Res., 84, p. 2755
- (1979) J. Geophys. Res., 84, p. 6603
- (1983) Solar Wind, 5, p. 163. , ed. M. Neugebauer (NASA Conf. Publ. CP-2280)
- Withbroe, G.L., (1988) ApJ, 325, p. 442
Citas:
---------- APA ----------
Canullo, M.V., Costa, A. & Ferro-Fontán, C. (1996) . Nonlocal heat transport in the solar wind. Astrophysical Journal, 462(2 PART I), 1005-1010.http://dx.doi.org/10.1086/177214
---------- CHICAGO ----------
Canullo, M.V., Costa, A., Ferro-Fontán, C. "Nonlocal heat transport in the solar wind" . Astrophysical Journal 462, no. 2 PART I (1996) : 1005-1010.http://dx.doi.org/10.1086/177214
---------- MLA ----------
Canullo, M.V., Costa, A., Ferro-Fontán, C. "Nonlocal heat transport in the solar wind" . Astrophysical Journal, vol. 462, no. 2 PART I, 1996, pp. 1005-1010.http://dx.doi.org/10.1086/177214
---------- VANCOUVER ----------
Canullo, M.V., Costa, A., Ferro-Fontán, C. Nonlocal heat transport in the solar wind. Astrophys. J. 1996;462(2 PART I):1005-1010.http://dx.doi.org/10.1086/177214
