Computer Science
Scientific paper
Aug 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jqsrt..60..261b&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 60, issue 2, pp. 261-276
Computer Science
4
Line Formation: Scattering, Line Formation: Radiative Transfer, Line Formation: Numerical Methods
Scientific paper
The FN method is used to develop a solution to a class of nongrey problems in the theory of radiative transfer. The model considered allows for scattering with complete frequency redistribution (completely noncoherent scattering) and continuum absorption. In addition to a general formulation, a specific solution is developed for an inhomogeneous source term (Planck function) that varies linearly with optical depth in a semi-infinite medium. Test problems based on Doppler and Lorentz profiles of the line-scattering coefficient are considered, and numerical results (thought to be correct to five significant figures) are given for the frequency-dependent intensity exciting the medium and for the source function within the medium. For comparison purposes, a previously reported solution that is expressed in terms of Chandrasekhar's H function is evaluated numerically.
Barichello L. B.
Siewert C. E.
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