Physics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..289k&link_type=abstract
Solar Physics, vol. 69, Feb. 1981, p. 289-300. Bundesministerium für Forschung und Technologie
Physics
14
Chromosphere, Emission Spectra, Faculae, Line Spectra, Solar Atmosphere, Solar Spectra, Sunspots, Calcium, Electron Density (Concentration), H Lines, K Lines, Lyman Alpha Radiation, Lyman Beta Radiation, Magnesium, Oso-8, Resonance Lines
Scientific paper
The paper reports observations of a sunspot and a nearby plage region by the LPSP instrument of OSO-8. The behaviors of the emission cores of Ca II H and K, and Mg II h and k resonance lines are very similar, and the correspondence in intensity between the four lines persists in all observed features. The Lyman lines, however, show little correlation with the other lines; their emission regions appear broader in the spectroheliograms than the underlying sunspot structure and do not necessarily have a counterpart in lower layers. An electron density of 4.3 x 10 to the 11th per cu cm at 20,000 K is estimated from the central intensity of Lyman-alpha above the umbra.
Artzner Guy
Kneer Franz
Lemaire Philippe
Mattig Wolfgang
Scharmer Goran
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