Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..807p&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 2, p. 807-810
Astronomy and Astrophysics
Astronomy
18
Emission Spectra, Infrared Astronomy, Iron, Silicon, Solar Corona, Electron Density (Concentration), Infrared Imagery, Spatial Distribution
Scientific paper
The wavelength of an infrared (Si X) coronal emission line is measured to be 1430.084 +/- 0.006 nm with a coronagraph of the National Solar Observatory at Sacramento Peak (NSOINP). New measurements of the infrared (Fe XIII) emission lines locate the central wavelengths at 1074.617 +/- 0.005 nm and 1079.783 +/- 0.006 nm. The slit-averaged line center intensities were 4.5, 27.8, and 5.2 (in units of 10-6 B(solar)) for the 1430 nm, 1075 nm, and 1080 nm emission lines, repectively. The spatial distribution of (Si X) emission is correlated with the coronal electron density as determined from the (Fe XIII) line ratio. Upper limits are set for coronal emission near 1266 nm and 1523 nm.
Kuhn Jeff R.
Penn Matt J.
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