Fast Method for Calculating Chromospheric Ca II and Mg II Radiative Losses

Details Fast Method for Calculating Chromospheric Ca II and Mg II Radiative Losses Fast Method for Calculating Chromospheric Ca II and Mg II Radiative Losses

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...631.1113r&link_type=abstract

The Astrophysical Journal, Volume 631, Issue 2, pp. 1113-1119.

Astronomy and Astrophysics

Astronomy

5

Methods: Numerical, Radiative Transfer, Stars: Chromospheres

Scientific paper

A fast and reasonably accurate method for calculating the total radiative losses by Ca II and Mg II ions for time-dependent chromospheric wave calculations has been developed. The method is based on a two-level atom procedure with pseudo-partial frequency redistribution (pseudo-PRD). The speed of the method is due to scaling of the total losses from single-line results. Acceleration of computation speeds by factors of roughly 102-103 can be achieved. The method is tested against the results from a modified version of the multilevel atom code MULTI.

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