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A note on the torsional oscillation at solar minimim

Howe, R., Christensen-Dalsgaard, J., Hill, F., Komm, R., Schou, J. and Thompson, M.J. (2009) A note on the torsional oscillation at solar minimim. Astrophysical Journal Letters, 701 (2). L87-L90. ISSN 0004-637X


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We examine the evolution of the zonal flow pattern in the upper solar convection zone during the current extended solar minimum, and compare it with that during the previous minimum. The results suggest that a configuration matching that at the previous minimum was reached during 2008, but that the flow band corresponding to the new cycle has been moving more slowly toward the equator than was observed in the previous cycle, resulting in a gradual increase in the apparent length of the cycle during the 2007-2008 period. The current position of the lower-latitude fast-rotating belt corresponds to that seen around the onset of activity in the previous cycle.

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 IOP. This is an author produced version of a paper subsequently published in Astrophysical Journal Letters. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Sun: activity; Sun: helioseismology; Sun: rotation
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 27 Aug 2009 14:41
Last Modified: 16 Nov 2015 11:48
Published Version: http://dx.doi.org/10.1088/0004-637X/701/2/L87
Status: Published
Publisher: IOP Publishing
Identification Number: 10.1088/0004-637X/701/2/L87
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/9259

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