Electron densities in a solar flare derived from X-ray spectra

Details Electron densities in a solar flare derived from X-ray spectra Electron densities in a solar flare derived from X-ray spectra

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238l..43m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 238, May 15, 1980, p. L43-L46.

Physics

45

Electron Density (Concentration), Satellite Observation, Solar Electrons, Solar Flares, Solar Physics, X Ray Spectra, Electron Pressure, Satellite-Borne Instruments, Solar Spectrometers

Scientific paper

A major solar flare was observed with the rubidium acid phthalate crystal of the satellite-borne SOLEX B spectrometer and high-resolution solar X-ray spectra were obtained during the rising phase of the flare. Measurements of the density-sensitive line ratio of the O VII 1s2 1S(0) - 1s2s 3S(1) (22.10 A) flux to the O VII 1s2 1S(0) - 1s2p 3P(1) (21.80 A) flux indicate that the density of the plasma at around 2,000,000 K exceeded 10 to the 11th per cu cm near the peak of the flare. This corresponds to an electron pressure of about 30 dynes per sq cm.

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