کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1782352 | 1523972 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of the solar wind flow during an activity cycle
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Analysis of the solar wind flow during an activity cycle Analysis of the solar wind flow during an activity cycle](/preview/png/1782352.png)
چکیده انگلیسی
We have analyzed the time series of solar wind velocity fluctuations measured by the Helios spacecraft in the inner heliosphere corresponding to solar cycle 21. To understand the local dynamics of fluctuations in the slow speed wind velocity, we have calculated the largest Lyapunov exponent and its variance for a total of 18 data sets measured at a distance of 0.32Â AU from the sun in the years 1975-1982. The Lyapunov exponents obtained are positive for all data sets but show large variance for some of the time series, suggesting inherent changes in the dynamics over the solar cycle. Furthermore, estimation of the correlation dimension for each of the 18 time series indicates presence of low-dimensional chaotic behavior in the underlying dynamics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 56, Issues 3â4, March 2008, Pages 530-536
Journal: Planetary and Space Science - Volume 56, Issues 3â4, March 2008, Pages 530-536
نویسندگان
Kopal Gupta, Awadhesh Prasad, Eeshankur Saikia, Harinder P. Singh,