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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/072/04/0743-0752

    • Keywords

       

      Solar wind plasma and sources of solar wind; time series analysis; nonlinear dynamics and chaos.

    • Abstract

       

      We have done a time series analysis of daily average data of solar wind velocity, density and temperature at 1 AU measured by ACE spacecraft for a period of nine years. We have used the raw data without filtering to give a faithful representation of the nonlinear behaviour of the solar wind flow which is a novel one. The sensitivity of the results on filtering is highlighted. The attractor dimension is estimated for every parameter of the solar wind and it is found that they differ substantially. Hence a chaotic picture for the problem from different angles have been obtained. The calculated Kolmogorov entropies and Lyapunov exponents are positive showing evidences that the complex solar wind near the Earth is most likely a deterministic chaotic system.

    • Author Affiliations

       

      Shollykutty John1 P J Kurian2

      1. Department of Physics, St. Joseph's College for Women, Alappuzha 688 001, India
      2. Centre for Research in Physics, St. Berchman's College, Changanacherry 686 101, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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