Letter to the Editor
Detection of the H I n=22-21 Rydberg line in emission at the solar submillimetre limb
T.A. Clark 1,
D.A. Naylor 2 and
G.R. Davis 3
Received 10 August 2000 / Accepted 4 September 2000
This letter reports the discovery of excess emission at the position of the HI n=22-21 Rydberg transition in submillimetre solar spectra taken at the extreme solar limb. This emission feature at 22.0960.003 cm-1 shows significant limb brightening, reaching intensities of 11% above the adjacent spectral continuum with line shapes fitted best by Gaussian functions with widths of 0.0180.004 cm-1. This measurement represents the highest-n Rydberg line of HI detected to date in the solar spectrum.
Key words: line: identification Sun: atmosphere Sun: general Sun: infrared
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This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 2000
Online publication: October 10, 2000