Statistical analysis of high-frequency narrowband dm-spikes

Details Statistical analysis of high-frequency narrowband dm-spikes Statistical analysis of high-frequency narrowband dm-spikes

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..347m&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

3

Sun: Flares, Sun: Radio Radiation, Methods: Data Analysis, Methods: Statistical

Scientific paper

Using linear and nonlienar methods narrowband dm-spikes recorded at 1420 and 2695 MHz were analyzed. In particular their time profiles were studied statistically. For selected spikes at 1420 MHz a more precise fitting technique using exponential profiles was applied. Generally, while in the decaying part the exponential trend can be found, in the ascending part the exponential form can be confirmed only in few cases. Furthermore, durations of 1420 and 2695 MHz spikes were determined and compared with the results in literature. Selected time series of spikes were tested with respect to nonlinearity. We found that spikes at fixed frequencies are not governed by a linear stochastic process, as the underlying physical system contains nonlinear signatures.

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