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Solar Physics

, Volume 127, Issue 2, pp 393–403 | Cite as

Period and phase of the 88-year solar cycle and the Maunder minimum: Evidence for a chaotic sun

  • J. Feynman
  • Stephen B. Gabriel
Article

Abstract

The problem of whether the solar dynamo is quasi-periodic or chaotic is addressed by examining 1500 years of sunspot, geomagnetic and auroral activity cycles. We find sub-harmonics of the fundamental solar cycle period during the years preceding the Maunder minimum and loss of phase of the subharmonic on emergence from it. These phenomena are indicative of chaos. They indicate that the solar dynamo is chaotic and is operating in a region close to the transition between period doubling and chaos. Since Maunder type minima reoccur irregularly for millennia, it appears that the Sun remains close to this transition to and from chaos. We postulate this as a universal characteristic of solar type stars caused by feedback in the dynamo number.

Keywords

Solar Cycle Activity Cycle Cycle Period Period Doubling Universal Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • J. Feynman
    • 1
  • Stephen B. Gabriel
    • 1
  1. 1.Jet Propulsion Laboratory, California Institute of TechnologyPasadenaU.S.A.

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