Statistics – Computation
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238.1042m&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 1042-1046.
Statistics
Computation
10
Radiative Transfer, Rotating Fluids, Stellar Atmospheres, Stellar Rotation, Stellar Winds, Velocity Distribution, Algorithms, Computerized Simulation, Transfer Functions
Scientific paper
It is shown that for spherically symmetric flows with nonmonotonic velocity fields, the solution of the two-level-atom transfer equation in the observer's frame remains a viable method, even at high flow speeds, on computers with vector-processing capabilities. This result is of importance because for such cases comoving-frame methods are, at best, extremely difficult (no successful calculation having been published to date), and Sobolev-theory methods become both cumbersome to use and inaccurate in many situations of interest. The basic algorithm is described and is illustrated by computations for spherically symmetric decelerating expansions.
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