A study of the He 10,830-A line emission from quiescent prominences

Physics

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Emission Spectra, Line Spectra, Solar Prominences, Solar Spectra, Spectral Line Width, Doppler Effect, Fine Structure, H Alpha Line, Helium, Optical Thickness, Spectrum Analysis

Scientific paper

Observations of the He 10,830-A line emission in a number of quiescent prominences are presented. The line shapes are analyzed to obtain values for the Doppler widths and optical thicknesses, leading to a determination of the 2(3)P-2(3)S excitation temperature as 4020 K. The results are compared with those of previous observational and theoretical research.

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