Waves of Solar Activity

  • M. R. E. Proctor
  • E. A. Spiegel
Part II Current stellar dynamo theory

DOI: 10.1007/3-540-53955-7_116

Part of the Lecture Notes in Physics book series (LNP, volume 380)
Cite this paper as:
Proctor M.R.E., Spiegel E.A. (1991) Waves of Solar Activity. In: Tuominen I., Moss D., Rüdiger G. (eds) The Sun and Cool Stars: activity, magnetism, dynamos. Lecture Notes in Physics, vol 380. Springer, Berlin, Heidelberg


We develop a theory of the sunspot cycle predicated on the assumption that the observed bands of activity are packets of dynamo waves. An approximate equation is proposed to describe the dynamics of these packets, using standard ideas from bifurcation theory. We show that in a certain limit the system can be described in terms of a slowlyevolving solitary wave, and that periodic behavior, like that of the observed butterfly diagram, can easily be found. Generalizations of the theory are discussed.


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • M. R. E. Proctor
    • 1
  • E. A. Spiegel
    • 2
  1. 1.Department of Applied Mathematics and Theoretical PhysicsUniversity of CambridgeCambridgeUK
  2. 2.Department of AstronomyColumbia UniversityNew YorkUSA

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