Coronal magnetic field strengths determined from fiber bursts

Details Coronal magnetic field strengths determined from fiber bursts Coronal magnetic field strengths determined from fiber bursts

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.285..153m&link_type=abstract

In ESA, Proceedings of an International School and Workshop on Reconnection in Space Plasma, Volume 2 p 153-156 (SEE N89-24974 1

Physics

2

Magnetic Flux, Solar Corona, Solar Magnetic Field, Type 4 Bursts, Fine Structure, Spectral Signatures, Whistlers

Scientific paper

A method of estimating coronal magnetic field strengths above active regions by means of fiber bursts appearing as a special fine structure in solar type-4 radio bursts is presented. The fiber bursts are considered as the radio signature of loss-cone instability driven whistler waves of a narrow frequency band. Numerical calculations indicate that narrow band whistlers are excited near the critical loss-cone angle. Thus, the frequency of the whistlers can be deduced. Then the magnetic field strength in the source region can be estimated by the fiber burst data adopting a coronal density model. The results are consistent with previous estimations.

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