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An interpretation of the polarization of microwave bursts (1979)

Kundu, M. R. ; Vlahos, L.

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Publication Date: 2019-06-27

Description: High-spatial-resolution (a few seconds of arc) observations of microwave bursts have demonstrated that only the impulsive phase of the burst is polarized; one observes only one polarity in the burst source if it is weak (Alissandrakis and Kundu) and both polarities if it is intense (Enome et al.). These results are interpreted in terms of an asymmetrical bipolar field structure of the loop in which the energetic electrons responsible for the radiation are contained. The role of unequal field strengths at the feet of the loop on the number of electrons trapped and their pitch angle distribution are discussed in a specific model. Computations of the polarized intensity originating from each foot of the loop seem to be consistent with the observations at present available.

Keywords: SOLAR PHYSICS

Type: Astrophysical Journal; vol. 232

Format: text

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