Plasma densities from the He-like ion NE IX

Details Plasma densities from the He-like ion NE IX Plasma densities from the He-like ion NE IX

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...157..116d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 157, no. 1, March 1986, p. 116-118.

Astronomy and Astrophysics

Astrophysics

9

Electron Density (Concentration), Line Spectra, Neon, Plasma Density, Solar Flares, Solar Spectra, Resonance Lines, Thermal Plasmas

Scientific paper

The authors present line emissivity data for the three principal lines of the He-like ion Ne IX. This data is compared with high resolution solar flare observations from the Solar Maximum Mission. During the rise phase of flares it is shown that the forbidden line is blended with a high temperature line, as opposed to the intercombination line suggested by McKenzie (1985). It is suggested that the electron density during the rise phase of flares be determined from the intercombination to resonance line ratio which the authors have integrated over a multi-thermal plasma and is shown to be only slightly dependent on the assumed differential emission measure distribution. Scattering of resonance line photons from the line-of-sight is shown to be unimportant.

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