Physics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...85...65n&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 85, May 1983, p. 65-82.
Physics
6
Chromosphere, Emission Spectra, Extreme Ultraviolet Radiation, Line Spectra, Solar Corona, Solar Spectra, Lyman Spectra, Optical Thickness, Spatial Distribution
Scientific paper
Using a series of EUV spectroheliograms of the quiet sun obtained with the Harvard spectroheliometer on Skylab, the spatial distribution of the weakening of the EUV line emission due to Lyman continuum absorption is examined. By comparing the differential emission measure of O IV wavelength 554 with those of lines with wavelength greater than 912 A, the degree of weakening for each pixel of spectroheliograms is determined. Using maps of the weakening, the portion of the network structure which shows the most intense weakening is studied as well as how the weakening varies from point to point. Finally, the nature of the chromospheric structure causing the weakening and the structure of the quiet sun transition zone are discussed.
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