A new scheme for multidimensional line transfer. II - ETLA method in one dimension with application to iron K-alpha lines

Details A new scheme for multidimensional line transfer. II - ETLA method in one dimension with application to iron K-alpha lines A new scheme for multidimensional line transfer. II - ETLA method in one dimension with application to iron K-alpha lines

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..561c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 10, 1992, p. 561-571. Research supported by NASA and Lawrence Li

Statistics

Computation

15

Active Galactic Nuclei, Computational Astrophysics, Computer Programs, K Lines, Nonequilibrium Thermodynamics, Radiative Transfer, X Ray Astronomy, Emission Spectra, Iron, Iteration, Line Spectra, Potassium, X Ray Spectra

Scientific paper

The 1D version of the radiation hydrodynamics computer code ALTAIR is discribed. It is an implementation of the equivalent two-level atom method, and also incorporates a variety of other iterative techniques to achieve a fast, accurate solution of the problem of coupled atomic kinetics and radiative transfer. All the techniques are described in sufficient detail to enable their use by others. The application of the program is illustrated by a set of calculations of the iron X-ray emission spectrum from intercloud hot gas that may exist in the broad-line region of active galactic nuclei. These calculations demonstrate that such spectra may be a rich load to mine for information about the hot gas in AGNs, and also that the concept of 'the iron K-alpha line' inadequately depicts the spectrum.

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