Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-07-24
2001, ApJ, 551, 576
Astronomy and Astrophysics
Astrophysics
32 pages, 27 figures, uses aastex.cls and epsfig.sty
Scientific paper
10.1086/320057
We develop a model of the solar dynamo in which, on the one hand, we follow the Babcock-Leighton approach to include surface processes like the production of poloidal field from the decay of active regions, and, on the other hand, we attempt to develop a mean field theory that can be studied in quantitative detail. One of the main challenges in developing such models is to treat the buoyant rise of toroidal field and the production of poloidal field from it near the surface. We build up a dynamo model with two contrasting methods of treating buoyancy. In one method, we incorporate the generation of the poloidal field near the solar surface by Durney's procedure of double ring eruption. In the second method, the poloidal field generation is treated by a positive alpha-effect concentrated near the solar surface, coupled with an algorithm for handling buoyancy. The two methods are found to give qualitatively similar results.
Choudhuri Arnab Rai
Nandy Dibyendu
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