Estimate of plasma parameters in a coronal loop by means of a fiber burst

Details Estimate of plasma parameters in a coronal loop by means of a fiber burst Estimate of plasma parameters in a coronal loop by means of a fiber burst

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..108..131a&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 108, no. 1, 1987, p. 131-137.

Physics

6

Coronal Loops, Plasma Diagnostics, Solar Magnetic Field, Solar Radio Bursts, Electromagnetic Radiation, Solitary Waves, Wave Packets

Scientific paper

Assuming Kuijpers' (1975) model, a fiber burst occurring in the event on August 19, 1981 is used to estimate physical parameters (the whistler frequency, magnetic field strength, temperature, and height dependence of the density) of the source volume in a coronal loop. The derived height dependence of the density in a coronal loop is found to agree with the model of an isothermal barometric loop atmosphere. The deduced magnetic field strength of 8 G at 42,000 km above the photosphere is one order too small in comparison with previous estimates, possibly because whistler solitons are mainly generated in coronal loops with unusually low magnetic field strengths.

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