Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009astl...35...45s&link_type=abstract
Astronomy Letters, Volume 35, Issue 1, pp.45-56
Astronomy and Astrophysics
Astronomy
4
Scientific paper
The relative intensities of FeXI-Fe XIII lines in the range 176 207 Å have been measured for various plasma structures of the solar corona using data from the XUV spectroheliograph of the SPIRIT instrumentation onboard the CORONAS-F satellite with an improved spectral sensitivity calibration. Electron density diagnostics of a plasma with temperatures 0.8 2.5 MK has been carried out in active regions, quiet-Sun and off-limb areas, and, for the first time, in extremely intense solar flares. The density range is (1.6 8) × 109 cm-3 for flares, (0.6 1.6) × 109 cm-3 for active regions, and ˜5 × 108 cm-3 for quiet-Sun areas. The calibration accuracy of the spectral sensitivity for the spectroheliograph has been analyzed based on spectral lines with density-independent intensity ratios.
Bogachev Sergey A.
Kuzin Sergei V.
Shestov Sergei V.
Urnov A. M.
Zhitnik Igor A.
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