The fine structure of prominences. IV - Spectral observations

Details The fine structure of prominences. IV - Spectral observations The fine structure of prominences. IV - Spectral observations

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...56...87e&link_type=abstract

Solar Physics, vol. 56, Jan. 1978, p. 87-106.

Physics

28

Fine Structure, H Alpha Line, H Lines, K Lines, Solar Prominences, Solar Spectra, Far Ultraviolet Radiation, Graphs (Charts), Optical Thickness, Spectrum Analysis

Scientific paper

High-spatial-resolution spectral observations of five hedgerow prominences were made in H-alpha, He 1 D3, and Ca II H and K. The observed relations between the lines were not the same in all prominences. The Ca II H and K lines were 2-4 times brighter relative to H-alpha and D3 than predicted theoretically. The optical thickness of H-alpha was less than for the H and K lines; the H-alpha was optically thin in medium faint prominence structures. Faint structures appeared slightly hotter than bright structures.

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