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Explaining the variation of the meridional circulation with the solar cycle

Published online by Cambridge University Press:  27 November 2018

Gopal Hazra  and
Arnab Rai Choudhuri
Gopal Hazra
Affiliation:
Dept. of Physics, Indian Institute of Science, Bangalore - 560012, India email: hgopal@iisc.ac.in, arnab@iisc.ac.in
Arnab Rai Choudhuri
Affiliation:
Dept. of Physics, Indian Institute of Science, Bangalore - 560012, India email: hgopal@iisc.ac.in, arnab@iisc.ac.in
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Abstract

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The meridional circulation of the Sun is observationally found to vary with the solar cycle, becoming slower during the solar maxima. We explain this by constructing a theoretical model in which the equation of the meridional circulation (the φ component of the vorticity equation) is coupled with the equations of the flux transport dynamo model. We find that the Lorentz force of the dynamo-generated magnetic fields can slow down the meridional circulation during the solar maxima in broad conformity with the observations.

Keywords

Sun: interiorSun: magnetic fieldsactivity

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