Radiation transfer with partial frequency redistribution and generalized redistribution functions.
Abstract
The author attempted to analyse the available astrophysical partial redistribution studies. He introduced the term quasi-Markovian, classical view, where the basic physical concepts of the current astrophysical approach are summarized. Its physical uncertainties, and even inconsistencies, are discussed in detail. The quasi-Markovian, classical treatment has been used to generalize the Oxenius (1965) approach. The reformulation of the Oxenius' approach, in the two-level-atom case, to a form similar to that of Milkey and Mihalas (1973) and Heasley and Kneer (1976) showed, that both formulations yield almost identical results. Using the same approach as in reformulating the two-level-atom case, the author derived a suitable form of the emission coefficient in the case of the multilevel atom. Comparing its form to that following from a heuristic derivation, two points appeared to be different.
- Publication:
-
40th Anniversary of the Principle of Invariance Introduction to the Radiation Transfer Theory
- Pub Date:
- 1989
- Bibcode:
- 1989fapi.conf..242H
- Keywords:
-
- Radiative Transfer