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Detailed non-LTE calculations of the iron emission from NGC 1068The X-ray iron line emission from NGC 1068 observed by the Ginga satellite is modeled using the new multiline, multilevel, non-LTE radiative transport code ALTAIR and a detailed atomic model for Ne-like through stripped iron. The parameter space of the obscured type 1 Seyfert nucleus model for this object is studied. The equivalent width is greater than previously predicted. It is found that detailed radiative transfer can have a significant effect on the observed line flux both for the K alpha line and for the L-shell emission. The ionization of the iron increases with temperature. Therefore the K alpha equivalent width and energy is a function not only of the ionization parameter, but also of the column depth and temperature. For a likely model of NGC 1068 it is found that the iron abundance is about twice solar, but that modifications of this model may permit a smaller abundance.
Document ID
19900016556
Document Type
Conference Paper
Authors
Band, David L. (California Univ. Berkeley., United States)
Klein, Richard I. (California Univ. Berkeley., United States)
Castor, John I. (Lawrence Livermore National Lab. CA., United States)
Nash, J. K. (Lawrence Livermore National Lab. CA., United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1989
Publication Information
Publication: ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-48
Distribution Limits
Public
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