Theoretical emission line strengths for the beryllium-like S XIII compared to XUV observations of solar flares

Astronomy and Astrophysics – Astronomy

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Emission Spectra, Line Spectra, Solar Flares, Spaceborne Astronomy, Beryllium, Electron Density Profiles, Far Ultraviolet Radiation

Scientific paper

A comparison of Skylab S082A observations for several solar flares with calculations of the electron temperature sensitive emission line ratio R1 = I(2s2p 1P - 2s2 1S)/I(2s2p 3p1 - 2s2 1S) = = 1(256.68 Å)/I(491.45 Å) in Be-like S XIII reveals good agreement between theory and experiment, which provides observational support for the accuracy of the adopted atomic data. However, observed values of the electron density sensitive ratio R2 = I(2s2p 1P - 2s2 1S)/I(2p2 3P2 - 2s2p 3P2) = = I(256.68 Å)/I(308.96 Å) all lie below the theoretical high density limit, which is probably due to blending in the 308.96 Å line.

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