Radio emission from acceleration sites of solar flares

Document Type

Article

Publication Date

1-1-2009

Abstract

This Letter takes up the question of what radio emission is produced by electrons at the very acceleration site of a solar flare. Specifically, we calculate incoherent radio emission produced within two competing acceleration models - stochastic acceleration by cascading MHD turbulence and regular acceleration in collapsing magnetic traps. Our analysis clearly demonstrates that radio emission from acceleration sites (1) has sufficiently strong intensity to be observed by currently available radio instruments, and (2) has spectra and light curves that are distinctly different in these two competing models, which makes them observationally distinguishable. In particular, we suggest that some of the narrowband microwave and decimeter continuum bursts may be a signature of the stochastic acceleration in solar flares. © 2009. The American Astronomical Society.

Identifier

77949522821 (Scopus)

Publication Title

Astrophysical Journal

External Full Text Location

https://doi.org/10.1088/0004-637X/701/1/L52

e-ISSN

15384357

ISSN

0004637X

First Page

L52

Last Page

L58

Issue

1 PART 2

Volume

701

Grant

0607544

Fund Ref

National Science Foundation

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