Solar Si  XI Line Ratios Observed by the Normal Incidence Spectrometer on SOHO CDS

被引：0
|
作者：
J. Lang
D.H. Brooks
M.G. O'Mullane
C.D. Pike
H.P. Summers
W.T. Thompson
机构：
[1] Rutherford Appleton Laboratory,Centro de Astrofisica
[2] Chilton,undefined
[3] Universidade do Porto,undefined
[4] University of Strathclyde,undefined
[5] Emergent Information Technologies Inc.,undefined
来源：
Solar Physics | 2001年 / 201卷
关键词：
Active Region; Intensity Ratio; Electron Temperature; Laboratory Measurement; Normal Incidence;
D O I：
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中图分类号：
学科分类号：
摘要：
New measurements of line intensity ratios in the Be-like ion Si xi are presented for observations of the quiet Sun, active regions, coronal holes and above-limb regions obtained using the Coronal Diagnostic Spectrometer on the Solar and Heliospheric Observatory. A model ion, constructed using the best available atomic data, is used to predict the line intensity ratios for a wide range of electron temperatures and densities. Comparisons of the theoretical ratios with the new intensity ratios as well as with those from previous solar observations and laboratory measurements are given. The usefulness of the ratios for electron temperature and density diagnostics, as well as for spectrometer calibration, is discussed.
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页码：37 / 55
页数：18
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