Mg VIII DIAGNOSTIC LINE RATIOS IN SKYLAB SOLAR OBSERVATIONS |
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| Authors: | Foster V J Keenan F P Reid R H G Doyle J G Zhang H L Pradhan A K Widing K G |
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| Institution: | (1) Department of Pure and Applied Physics, The Queen's University of Belfast, BT7 1NN Belfas, Ireland;(2) Department of Applied Mathematics and Theoretical Physics, The Queen's University of Belfast, BT7 1NN Belfas, Ireland;(3) Armagh Observatory, BT61 9DG Armagh, Ireland;(4) Department of Astronomy, Ohio State University, 43210 Columbus, Ohio, U.S.A.;(5) Naval Research Laboratory, Code 7674W, E. O. Hulburt Center for Space Research, 20375-5352, Washington DC, U.S.A. |
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| Abstract: | Recent calculations of Mgviii electron and proton impact excitations rates are used to derive theoretical electron temperature (T
e)- and density (N
e)-sensitive emission line ratios involving transitions in the 315–782 Å wavelength range. Some of these ratios are presented in the form of ratio–ratio diagrams, which should in principle allow both N
e and T
e to be deduced. These results are compared with solar observational data from Skylab, but agreement between theory and observation is very poor, probably due to blending. |
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