Abstract
We discuss the current status of solar dynamo theory and describe the dynamo model developed by our group. The toroidal magnetic field is generated in the tachocline by the strong differential rotation and rises to the solar surface due to magnetic buoyancy to create active regions. The decay of these active regions at the surface gives rise to the poloidal magnetic field by the Babcock-Leighton mechanism. This poloidal field is advected by the meridional circulation first to high latitudes and then down below to the tachocline. Dynamo models based on these ideas match different aspects of observational data reasonably well.
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References
Babcock, H. W. 1961,ApJ,133, 572.
Caligari, P., Moreno-Insertis, F., Schussler, M. 1995,ApJ,441, 886.
Chatterjee, P., Nandy, D., Choudhuri, A. R. 2004,A&A,427, 1019.
Choudhuri, A. R. 1989,Solar Phys.,123, 217.
Choudhuri, A. R. 1998, The Physics of Fluids and Plasmas: An Introduction for Astrophysicists, Cambridge University Press, Cambridge.
Choudhuri, A. R. 2003a, in Dynamic Sun (ed.) B. N. Dwivedi, Cambridge University Press, 103.
Choudhuri, A. R. 2003b,Solar Phys.,215, 31.
Choudhuri, A. R., Chatterjee, P., Nandy, D. 2004,ApJ,615, L57.
Choudhuri, A. R., Gilman, P. A. 1987,ApJ,316, 788.
Choudhuri, A. R., Nandy, D., Chatterjee, P. 2005,A&A,437, 703.
Choudhuri, A. R., Schussler, M., Dikpati, M. 1995,A&A,303, L29.
Dikpati, M., Charbonneau, P. 1999,ApJ,518, 508.
Dikpati, M., Gilman, P. A. 2001,ApJ,559, 428.
Dikpati, M., Rempel, M., Gilman, P. A., MacGregor, K. B. 2005,A&A,437, 699.
D’Silva, S., Choudhuri, A. R. 1993,A&A,272, 621.
Durney, B. R. 1995,Solar Phys.,160, 213.
Durney, B. R. 1997,ApJ,486, 1065.
Fan, Y., Fisher, G. H., DeLuca, E. E. 1993,ApJ,405, 390.
Giles, P. M., Duvall, T. L. Jr., Kosovichev, A. G., Scherrer, P. H. 1997,Nature,390, 52.
Guerrero, G. A., Munoz, J. D. 2004,MNRAS,350, 317.
Hale, G. E. 1908,ApJ,28, 315.
Hale, G. E., Ellerman, F., Nicholson, S. B., Joy, A. H. 1919,ApJ,49, 153.
Kuker, M., Rüdiger, G., Schultz, M. 2001,A&A,374, 301.
Leighton, R. B. 1969,ApJ,156, 1.
Nandy, D., Choudhuri, A. R. 2001,ApJ,551, 576.
Nandy, D., Choudhuri, A. R. 2002,Science,296, 1671.
Parker, E. N. 1955a,ApJ,122, 293.
Parker, E. N. 1955b,ApJ,121, 491.
Parker, E. N. 1979, Cosmical Magnetic Fields, Clarendon Press, Oxford.
Schwabe, S. H. 1844,Astron. Nachr.,21, 2.
Steenbeck, M., Krause, F., Radler, K. H. 1966,Z.Naturforsch.,21 (a), 369.
Wang, Y.-M., Nash, A. G., Sheeley, N. R. 1989,ApJ,347, 529.
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Rai Choudhuri, A. Some recent developments in solar dynamo theory. J Astrophys Astron 27, 79–85 (2006). https://doi.org/10.1007/BF02702509
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DOI: https://doi.org/10.1007/BF02702509