Non-thermal and non-equilibrium effects in soft X-ray flare spectra

Details Non-thermal and non-equilibrium effects in soft X-ray flare spectra Non-thermal and non-equilibrium effects in soft X-ray flare spectra

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...86...59g&link_type=abstract

(Japan Society for the Promotion of Science and National Science Foundation, U.S.-Japan Seminar on the Recent Advances in the Un

Physics

1

Nonequilibrium Thermodynamics, Nonthermal Radiation, Solar Electrons, Solar Flares, Solar Spectra, Solar X-Rays, X Ray Spectra, Electron Distribution, Gas Ionization, Plasma Equilibrium, Resonance Lines

Scientific paper

The processes leading to the excitation of soft X-ray line spectra are examined in relation to their thermal or nonthermal nature. Results of analyses of calcium spectra from the X-ray Polychromator experiment on the Solar Maximum Mission indicate that the ionization balance during the gradual phase of flares is effectively in the steady-state. In complex flares with multiple impulsive features, it is found that soft X-ray line intensity anomalies are present, which are consistent with the existence of short bursts of nonthermal electrons producing selective excitation of certain lines.

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