Thermal models for solar hard X-ray bursts

Details Thermal models for solar hard X-ray bursts Thermal models for solar hard X-ray bursts

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238.1126s&link_type=abstract

Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 1126-1133.

Computer Science

Numerical Analysis

53

Heat Flux, Ion Acoustic Waves, Magnetohydrodynamic Stability, Solar X-Rays, Thermodynamic Coupling, Numerical Analysis, Solar Physics, X Ray Spectra

Scientific paper

Thermal models for hard X-ray bursts consisting of a one-dimensional flux tube whose central electrons are heated to about 400 million K are examined. It is found that the evolution of a thermal X-ray source is a sensitive function of the electron-ion thermal coupling and the state of the plasma into which the source expands. When this coupling is weak, the heated electrons separate into a region of high temperature of about 400 million K and a region of lower temperature of about 100 million K, a process which leads to a power-law X-ray spectrum. In the case of strong coupling there is only one dominant temperature, about 200 million K, and the X-ray spectrum resembles a true thermal spectrum.

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