Artículo
Abstract:
The generation of magnetic field on the Sun is caused by a dynamo mechanism, and is related with the differential rotation of the solar interior. Helioseismologic observations show that strong velocity gradients concentrate in a thin layer located at the base of the convective region, known as the tachocline. This remarkable observational finding lends support to a theoretical model for the solar dynamo, based on a magnetohydrodynamic extension of the so called shallow water approximation. We developed a numerical code to integrate the dynamic equations. Our analysis shows an initial stage during which the magnetic energy grows exponentially fast. In a subsequent stage we find that magnetic energy keeps growing until it reaches equipartition with the mechanical energy of the flow. © 2004 Elsevier B.V. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Toward a dynamo model for the solar tachocline |
| Autor: | Lillo, R.; Mininni, P.D.; Gómez, D.O. |
| Filiación: | Inst. de Astronomia y Fis. del E., C.C. 67-Suc. 28, (1428) Buenos Aires, Argentina Departamento de Física, Fac. de Ciencias Exactas y Naturales, Univ. de Buenos Aires, C. Univ., 1428 Buenos Aires, Argentina |
| Palabras clave: | Dynamo theories; Magnetic fields; Sun; Approximation theory; Heat convection; Magnetic fields; Magnetohydrodynamics; Mathematical models; Velocity; Dynamo theories; Helioseismology; Magnetic energy; Solar dynamo; Sun |
| Año: | 2005 |
| Volumen: | 349 |
| Número: | 3-4 |
| Página de inicio: | 667 |
| Página de fin: | 674 |
| DOI: | http://dx.doi.org/10.1016/j.physa.2004.10.037 |
| Título revista: | Physica A: Statistical Mechanics and its Applications |
| Título revista abreviado: | Phys A Stat Mech Appl |
| ISSN: | 03784371 |
| CODEN: | PHYAD |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03784371_v349_n3-4_p667_Lillo |
Referencias:
- Krause, F., Rädler, K.-H., (1980) Mean-Field Magnetohydrodynamics and Dynamo Theory, , Pergamon Oxford
- Forgács-Dajka, E., Petrovay, K., (2001) Sol. Phys., 203, p. 195
- Caligari, P., Moreno-Insertis, F., Schüssler, M., (1995) Astrophys. J., 441, p. 886
- Gilman, P.A., (2000) Astrophys. J., 544, pp. L79
- Toro, E.F., (2001) Shock-Capturing Methods for Free Surface Shallow Fluids, , Wiley New York
- De Sterck, H., (2001) Phys. Plasmas, 8, p. 3293
- Ripa, P., (1991) J. Fluid Mech., 222, p. 119
- Cho, J.Y.-K., Polvani, L.M., (1996) Science, 273, p. 335
- Prendergast, K.H., (1960) Astrophys. J., 132, p. 162
- Brandenburg, A., (2001) Astrophys. J., 550, p. 824
- Orzag, S.A., Patterson, G.S., (1972) Phys. Rev. Lett., 28, p. 76
Citas:
---------- APA ----------
Lillo, R., Mininni, P.D. & Gómez, D.O. (2005) . Toward a dynamo model for the solar tachocline. Physica A: Statistical Mechanics and its Applications, 349(3-4), 667-674.http://dx.doi.org/10.1016/j.physa.2004.10.037
---------- CHICAGO ----------
Lillo, R., Mininni, P.D., Gómez, D.O. "Toward a dynamo model for the solar tachocline" . Physica A: Statistical Mechanics and its Applications 349, no. 3-4 (2005) : 667-674.http://dx.doi.org/10.1016/j.physa.2004.10.037
---------- MLA ----------
Lillo, R., Mininni, P.D., Gómez, D.O. "Toward a dynamo model for the solar tachocline" . Physica A: Statistical Mechanics and its Applications, vol. 349, no. 3-4, 2005, pp. 667-674.http://dx.doi.org/10.1016/j.physa.2004.10.037
---------- VANCOUVER ----------
Lillo, R., Mininni, P.D., Gómez, D.O. Toward a dynamo model for the solar tachocline. Phys A Stat Mech Appl. 2005;349(3-4):667-674.http://dx.doi.org/10.1016/j.physa.2004.10.037
