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An Extended Multi-Zone Model for the MCG-6-30-15 Warm AbsorberThe variable warm absorber seen with ASCA in the X-ray spectrum of MCG 6-30-15 shows complex time behaviour in which the optical depth of O VIII anticorrelates with the flux whereas that of O VII is unchanging. The explanation in terms of a two zone absorber has since been challenged by BeppoSAX observations. These present a more complicated behaviour for the O VII edge. The explanation we offer for both ASCA and BeppoSAX observations requires a very simple photoionization model together with the presence of a third, intermediate, zone and a period of very low luminosity. In practice warm absorbers are likely to be extended, multi-zone regions of which only part causes directly observable absorption edges at any given time depending on the value of the luminosity.
Document ID
20000090671
Document Type
Conference Paper
Authors
Morales, R. (Institute of Astronomy Cambridge, United Kingdom)
Fabian, A. C. (Institute of Astronomy Cambridge, United Kingdom)
Reynolds, C. S. (Colorado Univ. Boulder, CO United States)
Date Acquired
August 19, 2013
Publication Date
May 1, 2000
Publication Information
Publication: Astrophysical Plasmas: Codes, Models, and Observations
Volume: 9
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-6337
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: HF-01113.01-98A
Distribution Limits
Public
Copyright
Other