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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Gyrosynchrotron Emission from Anisotropic Pitch-Angle Distribution of Electrons in 3-D Solar Flare Sources

Texto completo
Autor(es):
Simoes, P. J. A. [1] ; Costa, J. E. R. [2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] CRAAM, BR-01302907 Sao Paulo - Brazil
[2] Inst Nacl Pesquisas Espaciais, BR-12227010 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: SOLAR PHYSICS; v. 266, n. 1, p. 109-121, SEP 2010.
Citações Web of Science: 12
Resumo

We present calculations, made for the first time, of the gyrosynchrotron emission by mildly relativistic electrons with anisotropic pitch-angle distribution using a realistic magnetic loop model in three dimensions. We investigated the intensity, spectral index of the optically thin region of the spectrum, the spatial morphology and the dependency on the source position on the solar disk. The method to describe a three-dimensional source and the procedure to perform the calculations are presented. We have modified the Ramaty's gyrosynchrotron code to allow the evaluation of anisotropic pitch-angle electron distributions, as described in the complete formalism. We found that anisotropic electron distributions affect the intensity of the radiation, spatial morphology and spectrum of spatially resolved sources. However, the spatially integrated spectrum of the emission seems to be insensitive to the electron pitch-angle distribution, as the magnetic field inhomogeneity smooths out the effects of the anisotropic distribution in the produced radiation, in contrast to homogeneous sources. (AU)

Processo FAPESP: 03/03406-6 - Radiação girossincrotrônica de explosões solares em ambientes complexos de campos magnéticos
Beneficiário:Paulo José de Aguiar Simões
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 04/14248-5 - Distribuição espacial dinâmica de elétrons em explosões solares
Beneficiário:Paulo José de Aguiar Simões
Linha de fomento: Bolsas no Brasil - Doutorado