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eJAAVSO

Semiregular Variables: Are They Chaotic or Ringing?

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Charles A. Whitney

Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138

 

Abstract

 

Two types of irregular behavior in semiregular variables, labeled randomness and chaos, are described and the results of recent theoretical explorations are illustrated. The need for precise long-term observations to distinguish between multi-periodic and irregular pulsations in semiregular variables is emphasized.

 

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