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Why Does the Sun's Torsional Oscillation Begin before the Sunspot Cycle?

Chakraborty, Sagar and Choudhuri, Arnab Rai and Chatterjee, Piyali (2009) Why Does the Sun's Torsional Oscillation Begin before the Sunspot Cycle? In: Physical Review Letters, 102 (4). 041102-1-4.

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Abstract

Although the Sun's torsional oscillation is believed to be driven by the Lorentz force associated with the sunspot cycle, this oscillation begins 2-3 yr before the sunspot cycle. We provide a theoretical explanation of this with the help of a solar dynamo model having a meridional circulation penetrating slightly below the bottom of the convection zone, because only in such dynamo models does the strong toroidal field form a few years before the sunspot cycle and at a higher latitude.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 24 Mar 2009 09:24
Last Modified: 19 Sep 2010 05:27
URI: http://eprints.iisc.ernet.in/id/eprint/19169

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