Periodicities in fine structure of type IV radio solar bursts

被引：0

作者：

Tsitsipis, P. ^{[1
]}

Kontogeorgos, A. ^{[1
]}

Moussas, X. ^{[2
]}

Preka-Papadema, P. ^{[2
]}

Hillaris, A. ^{[2
,3
]}

Petoussis, V. ^{[1
]}

Caroubalos, C. ^{[2
]}

Alissandrakis, C. E. ^{[4
]}

Bougeret, J. -L. ^{[5
]}

Dumas, G. ^{[5
]}

机构：

[1] Technol Educ Inst Lamia, Lamia, Greece

[2] Univ Athens, Athens 15783, Greece

[3] Hellenic Naval Acad, Piraeus 18503, Greece

[4] Univ Ioannina, Ioannina 45110, Greece

[5] Observ Paris, CNRS, UA 264, F-92195 Meudon, France

来源：

RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS | 2006年 / 848卷

关键词：

solar activity; corona; radio; radiation and spectra; solar electromagnetic emission;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A study of periodicities appearing in the type-IV bursts fine structure (fibers and pulsations in particular) is presented. Our data set includes recordings by ARTEMIS IV with high time resolution; this facilitates the detection of lower than 1 sec periodicities. We introduce a method which employs directional filtering for the separation of intertwined fibers and pulsations for independent analysis of different events within complex radio bursts. For further analysis we use Short Time Fourier and Wavelet transforms which enable the study of the evolution of periodicities with time over specified periods of solar radio activity. Since, according to existing theoretical models, periodicities depend on basic parameters of active regions, this methodology provides the appropriate diagnostic tools.

引用

页码：243 / +

页数：2

共 50 条

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