KEENAN, FP and HARRA, LK and DOSCHEK, GA and COOK, JW (1994) THE DETERMINATION OF ELECTRON-DENSITIES IN THE SOLAR ATMOSPHERE FROM THE 1718.56-ANGSTROM 1486.51-ANGSTROM EMISSION-LINE RATION IN N-IV. ASTROPHYS J , 432 (2) 806 - 808.
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Abstract
The theoretical electron density sensitive emission-line ratio R = I(1718.56 Angstrom)/I(1486.51 Angstrom) in N IV is presented for a range of N-e (similar or equal to 10(10)-10(12) cm(-3)) applicable to higher density solar plasmas, such as active regions. A comparison of these calculations with the observed values of R of several solar features obtained with the Naval Research Laboratory's S082B spectrograph on board Skylab reveals general agreement between theory and observation at pointings just above the limb, where line blends with N IV 1718.56 Angstrom should be insignificant, which provides experimental support for the accuracy of the line ratio calculations.
| Type: | Article |
|---|---|
| Title: | THE DETERMINATION OF ELECTRON-DENSITIES IN THE SOLAR ATMOSPHERE FROM THE 1718.56-ANGSTROM 1486.51-ANGSTROM EMISSION-LINE RATION IN N-IV |
| Keywords: | SUN, ACTIVITY, SUN, ATMOSPHERE, SUN, CORONA, SUN, UV RADIATION, IMPACT EXCITATION RATES, COLLISION STRENGTHS, C-III, SUN, SPECTRUM, IONS |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics |
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