Gradient pattern analysis of short solar radio bursts

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Gradient pattern analysis of short solar radio bursts

Rosa, R.R. / Karlický, M. / Veronese, T.B. / Vijaykumar, N.L. / Sawant, H.S. / Borgazzi, A.I. / Dantas, M.S. / Barbosa, E.B.M. / Sych, R.A. / Mendes, O.

Abstract

AbstractWe analyze the weak component of the localized temporal pattern variability of 3GHz solar burst observed by the Ondrejov radiospectrograph. A complex, short and weak impulsive sample from the time series was analyzed by applying a method based on the gradient pattern analysis and discrete wavelet decomposition. By analyzing canonical temporal variability patterns we show that the new method can reliably characterize the phenomenological dynamical process of short time series (N10³ measurements) as the radio burst addressed here. In the narrowest sense, by estimating the mutual information distance in the gradient spectra, we show that the fluctuation pattern of the short and weak 3GHz impulsive solar burst, with energetic amplitudes <350 SFU, is closer to the intermittent and strong MHD turbulent variability pattern.

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Document information

Title :

Gradient pattern analysis of short solar radio bursts

Contributors:

Rosa, R.R. (author) / Karlický, M. (author) / Veronese, T.B. (author) / Vijaykumar, N.L. (author) / Sawant, H.S. (author) / Borgazzi, A.I. (author) / Dantas, M.S. (author) / Barbosa, E.B.M. (author) / Sych, R.A. (author) / Mendes, O. (author)

Published in:

Advances in Space Research ; 42 , 5 ; 844-851

Publication date :

2007-08-14

Size :

8 pages

ISSN :

0273-1177

DOI :

https://doi.org/10.1016/j.asr.2007.08.015

Type of media :

Article (Journal)