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Modelling grand minima of solar activity using a flux transport dynamo model

Published online by Cambridge University Press:  18 July 2013

Bidya Binay Karak  and
Arnab Rai Choudhuri
Bidya Binay Karak
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: bidya_karak@physics.iisc.ernet.in
Arnab Rai Choudhuri
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India email: bidya_karak@physics.iisc.ernet.in
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Abstract

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The occurrence of grand minima like the Maunder minimum is an intriguing aspect of the sunspot cycle. We use the flux transport dynamo model to explain the grand minima, showing that they arise when either the poloidal field or the meridional circulation falls to a sufficiently low value due to fluctuations. Assuming these fluctuations to be Gaussian and determining the various parameters from the data of the last 28 cycles, we carry on a dynamo simulation with both these fluctuations. The results are remarkably close to the observational data.

Keywords

Sun: activitySun: magnetic fieldssunspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 433 - 438
Copyright
Copyright © International Astronomical Union 2013 

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