Abstract
view Abstract Citations (20) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Helium Equilibrium in Prominences and the Chromosphere. Zirin, Harold Abstract The equilibrium of helium in a gas suspended above the photosphere is analyzed by computing in detail the various atomic processes involved and writing down the equilibrium equations. These equations are solved for the occupation numbers of He iii, He ii, and the various important He I levels, in order to predict the relative intensity of helium lines. The triplet levels are in equilibrium (referred to the state) with the photospheric radiation with the proper dilution factor. This gives good agreement with the 5876/10830 ratio measured by Severny. Particular attention is paid to the ratio of the lines 6678/5876. This is found to vary with temperature only, and the observed ratio should be a good measure of the temperature of helium. Publication: The Astrophysical Journal Pub Date: May 1956 DOI: 10.1086/146191 Bibcode: 1956ApJ...123..536Z full text sources ADS |
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