Other
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45...15a&link_type=abstract
Solar Physics, vol. 45, Nov. 1975, p. 15-23.
Other
6
Atmospheric Composition, Atmospheric Models, Electron Transitions, Hydrogen, Radiative Transfer, Isothermal Processes, Optical Thickness, Population Theory, Transition Probabilities
Scientific paper
Populations for the first three bound states and the continuum of hydrogen are determined for an isothermal hydrostatic atmosphere at 20,000 K. The atmosphere is treated as optically thin in the Balmer and Paschen continua and illuminated by continuum radiation at these wavelengths with prescribed radiation temperatures. The atmosphere is optically thick in the 2-1, 3-1, 3-2 and c-1 transitions. Three stages of approximation are treated: (1) radiative detailed balance in the 2-1, 3-1 and 3-2 transitions, (2) radiative detailed balance in the 3-1 and 3-2 transitions, and (3) all transitions out of detailed balance. The solution of this problem is nontrivial and presents sufficient difficulty to have caused the failure of at least one rather standard technique. The problem is thus a good archetype against which new methods or new implementations of old methods may be tested.
Athay Grant R.
Mihalas Dimitri
Shine Richard A.
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