Physics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..313k&link_type=abstract
Solar Physics, vol. 69, Feb. 1981, p. 313-326.
Physics
5
Extreme Ultraviolet Radiation, Lyman Spectra, Optical Thickness, Solar Prominences, Solar Radiation, Spectroheliographs, Calcium, Continuous Spectra, Electron Density (Concentration), Gas Density, Hydrogen, Line Spectra, Magnesium, Neutral Gases, Oxygen, Skylab Program, Solar Limb, Solar Spectra
Scientific paper
The optical depth at the head of the Lyman continuum, tauH, was determined at several positions in three hedgerow prominences using spectroheliograms of C III 977 A, LC 896 A, and O IV 554 A, observed with the Harvard experiment on Skylab. It is found that tauH varies over a wide range at positions even in a single prominence. At the central part of the prominences where the opacity is largest, tauH reaches a maximum value of 30 to 50 for the three prominences. In general, tauH decreases with height in the prominences. Most positions near the outer boundary of the prominences are optically thin in the LC (tauH less than 1). The determination of tauH for P23 is consistent with the data of the Mg X spectroheliograms
Kanno Megumi
Noyes Robert W.
Withbroe George L.
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