Chaos in the solar wind flow near Earth |
| |
Authors: | Shollykutty John and P J Kurian |
| |
Institution: | (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 |
| |
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.
|
| |
Keywords: | Solar wind plasma and sources of solar wind time series analysis nonlinear dynamics and chaos |
本文献已被 SpringerLink 等数据库收录! |
|