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The Effect of a Magnetic Field on Individual Convective Cells

Published online by Cambridge University Press:  25 April 2016

J. O. Murphy
J. O. Murphy*
Affiliation:
Department of Mathematics, Monash University, Clayton
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Extract

The darkness of sunspots has been attributed by many authors (Biermann 1941; Danielson 1961) to the inhibition of the normal solar convective processes by the presence of strong magnetic fields. Observations of the solar photospheric granulation pattern have also shown that a weak longitudinal field exists outside the activity regions. Although these observations have not revealed any close association between the magnetic field and individual granules, nor the exact reasons for the darker cell boundaries, it must be accepted that, overall, the role of the magnetic field must be such as to influence the cell structure and reduce the normal heat transfer by convection.

Type
Stellar
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 5 , September 1974 , pp. 267 - 269
Copyright
Copyright © Astronomical Society of Australia 1974

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References

Biermann, L., Vjschr. Astron. Ges. Leipz., 76, 194 (1941).Google Scholar
Danielson, R. E., Astrophys. J., 134, 289 (1961).Google Scholar
Van der Borght, R. and Murphy, J. O., Aust. J. Phys., 26, 617 (1973).Google Scholar
Van der Borght, R., Murphy, J. O. and Spiegel, E. A., Aust. J. Phys., 25, 703 (1972).Google Scholar