Physics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...92..199m&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 92, May 1984, p. 199-216. Research supported by the Science and Engineering Research Counci
Physics
28
Iron, Line Spectra, Solar Flares, Solar Spectra, Ultraviolet Spectra, Electron Scattering, Extreme Ultraviolet Radiation, Metal Ions, Nickel, Oso-5, Solar X-Rays
Scientific paper
Recent atomic data have been used to analyze a solar flare spectrum obtained with the Goddard Space Flight Center's grating spectrometer on the OSO-5 satellite. There exist in the wavelength region 90-200 A strong lines from each of the ions Fe XVIII-Fe XXIV. The Fe XXI lines can be used as an electron density diagnostic for the 10 to the 7th K plasma. From an analysis of a particular flare, a steep positive slope in the emission measure between 10 to the 6.5th and 10 to the 7.2th K and an electron density of about 4 x 10 to the 11th per cu cm at 10 to the 7th K is found. The need is emphasized for high spectral and spatial resolution observations of solar flares in this wavelength region, which has to date been largely neglected.
Bhatia Anand K.
Kastner Sidney O.
Mason Harris E.
Neupert Werner M.
Swartz Marvin
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