Fe XV line ratios in the sun - Discrepancies between theory and observations

Details Fe XV line ratios in the sun - Discrepancies between theory and observations Fe XV line ratios in the sun - Discrepancies between theory and observations

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..323d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 10, 1990, p. 323-328.

Other

16

Iron, Solar Flares, Solar Spectra, Electron Density (Concentration), Electron Impact, Electron Scattering, Electron Transitions, Emission Spectra

Scientific paper

New atomic data for the electron impact collision rates are presented and used to calculate Fe XV line intensity ratios. These are compared with observations of solar flares, leading to discrepancies similar to those found by previous authors. A careful evaluation of possible error sources indicates that the atomic data may be incorrect. Two possible explanations are suggested for this which could have implications for plasma diagnostics using other ions.

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