Statistics – Computation
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....23..583s&link_type=abstract
(Astrofizika, vol. 23, Nov.-Dec. 1985, p. 583-594) Astrophysics (ISSN 0571-7132), vol. 23, no. 3, May 1986, p. 711-718. Translat
Statistics
Computation
Computational Astrophysics, Iterative Solution, Line Spectra, Radiation Distribution, Radiative Transfer, Stellar Atmospheres, Optical Thickness, Quadratures, Radiation Sources
Scientific paper
An iterative method is proposed for calculating the radiation field at spectral line frequencies for plane-parallel moving atmospheres under the assumption of complete frequency redistribution. The method uses an approximate relationship between the total source function and the intensity to obtain the source function in the line. The time required for this calculation using this method is only three to five times greater than the time needed to obtain the formal solution of the equation, which is several times less than that required with the usually employed methods of Rybicki (1971) or Feautrier (1964). The basic equations, single-point quadrature formula, and algorithm for solving the equation of radiative transfer are presented and discussed, and the results of numerical experiments are reported.
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