Dynamics of coronal magnetic fields inferred from multi-frequency radio observations of a solar flare
Tipo
Artigo
Data de publicação
2002
Periódico
COSPAR Colloquia Series
Citações (Scopus)
0
Autores
Correia E.
Raulin J.-P.
Trottet G.
Kaufmann P.
Raulin J.-P.
Trottet G.
Kaufmann P.
Orientador
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ISSN da Revista
Título de Volume
Membros da banca
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Resumo
We analysed multi-frequency radio and hard X-Ray observations of an M1.5 solar flare that occurred on November 5, 1998. The event was observed at various discrete radio frequencies from decimetric to microwave wavelengths, covering a wide range of coronal altitudes. Using combined imaging radio and hard X-Ray emissions it was possible to follow the dynamics of solar magnetic fields from the low corona up to about 0.5 solar radius above the photosphere. The radio spectra show different characteristics during event evolution, suggesting the appearance of new sources. The imaging analysis at hard X-Rays and decimetric/metric waves confirmed the presence of various and distinct emitting sources during the event, suggesting a dynamic and complex magnetic topology, probably associated with different injection of nonthermal electrons. © 2002 Elsevier B.V. All rights reserved.