Ca X line ratios in solar flares |
| |
| Authors: | F P Keenan V J Foster I J Roche M Mohan K G Widing |
| |
| Affiliation: | (1) Department of Pure and Applied Physics, The Queen's University of Belfast, BT7 INN Belfast, Northern Ireland;(2) Department of Physics, Kirori Mal College, Delhi University, 110007 Delhi, India;(3) Code 4174W, E.O. Hulburt Center for Space Research, Naval Research Laboratory, 20375-5000 Washington DC, USA |
| |
| Abstract: | Theoretical Ca X electron temperature sensitive emission line ratios, derived using electron excitation rates interpolated from accurateR-matrix calculations, are presented forR
1 =I(419.74  )/I(574.02 ,),R
2 =I(411.65 )/I(574.02 ),R
3 =I(419.74 )/I(557.75 ), andR
4 =I(411.65 )/I(557.75 ). A comparison of these with observational data for three solar flares, obtained by the Naval Research Laboratory's S082A slitless spectrograph on boardSkylab, reveals good agreement between theory and observation forR
1 andR
3 in one event, which provides limited support for the accuracy of the atomic data adopted in the analysis. However, in the other flares the observed values ofR
1 –R
4 are much larger than the theoretical high-temperature limits, which is probably due to blending of the 419.74 line with Civ 419.71 , and 411.65 with possibly Ciii 411.70 . |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
