Testing for nonlinearity in the solar wind flow.

Details Testing for nonlinearity in the solar wind flow. Testing for nonlinearity in the solar wind flow.

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998csf.....9..221m&link_type=abstract

Chaos Solitons Fractals, Vol. 9, No. 1 - 2, p. 221 - 230

Computer Science

5

Solar Wind: Streams, Solar Wind: Heliosphere, Solar Wind: Chaotic Motions

Scientific paper

The authors analyse a time series of the velocities of the low-speed stream measured by the Helios spacecraft in the inner heliosphere, which is a region of space dominated by the solar wind flow. They use a moving average (linear) filter to give a faithful representation of the system's nonlinear behaviour. They have found that trajectories describing the system in phase space asymptotically approach the attractor of the low dimension of 3 to 4. These values are significantly different from the values computed for the surrogate data. Thus these results provide evidence that the inner heliosphere is likely to be a nonlinear chaotic system.

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