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A new scheme for multidimensional line transfer. II - ETLA method in one dimension with application to iron K-alpha linesThe 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.
Document ID
19920044689
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Castor, John I.
(NASA Headquarters Washington, DC United States)
Dykema, Pieter G.
(Lawrence Livermore National Laboratory Livermore, CA, United States)
Klein, Richard I.
(Lawrence Livermore National Laboratory, Livermore; California, University Berkeley, United States)
Date Acquired
August 15, 2013
Publication Date
March 10, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 387
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A27313
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-48
Distribution Limits
Public
Copyright
Other

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