Fast approximations for the R(II-A) redistribution function

Details Fast approximations for the R(II-A) redistribution function Fast approximations for the R(II-A) redistribution function

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..195g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 1, May 1986, p. 195-198.

Statistics

Computation

22

Approximation, Coherent Scattering, Computational Astrophysics, Distribution Functions, Line Spectra, Radiative Transfer, Stellar Spectra, Lyman Alpha Radiation, Solar Spectra

Scientific paper

Approximations are proposed for the computation of the RII-A redistribution function (which describes the redistribution of frequencies for photons scattered coherently in the atom's frame). These approximations are particularly efficient on vector computers. Precision and timing properties of the method are examined for a typical line formation problem (Lyα in the solar atmosphere).

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