Dielectronic satellite spectra for highly charged helium-like ions. IV - Iron satellite lines as a measure of non-thermal electron energy distributions

Details Dielectronic satellite spectra for highly charged helium-like ions. IV - Iron satellite lines as a measure of non-thermal electron energy distributions Dielectronic satellite spectra for highly charged helium-like ions. IV - Iron satellite lines as a measure of non-thermal electron energy distributions

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..319g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 319-327.

Astronomy and Astrophysics

Astronomy

39

Astronomical Spectroscopy, Electron Energy, Line Spectra, Solar Flares, Spectral Energy Distribution, Electron Recombination, Helium Ions, High Energy Electrons, High Resolution, Intercosmos Satellites, Iron, Satellite-Borne Instruments, Solar Spectra, X Ray Spectra

Scientific paper

The intensities of two satellite lines 1s2 nl-1s 2pnl with n = 2 and 3 relative to the Fe XXV resonance line 1s2-1s 2p are considered. The intensities of these three lines are described by a single temperature only if the emitting plasma has a Maxwellian distribution of electrons. Analysis of the measured relative line intensities is proposed as a means of detecting departures from Maxwellian distributions, such as occur in solar flares. No data yet exist with the required quality to which the method may be applied, but an illustration is provided by two flares in which nonthermal electrons are present, and expected line ratios are deduced from these.

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