Precision Fe Kalpha and Fe Kbeta Line Spectroscopy of the Seyfert 1.9 Galaxy NGC 2992 with Suzaku(Chapter 10. Super Massive Black Holes, The Extreme Universe in the Suzaku Era)
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概要
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We present detailed time-averaged X-ray spectroscopy of the Seyfert 1.9 galaxy NGC 2992 with the XIS. The XIS spectrum of NGC 2992 can be described by several components. There is a primary continuum that is obscured by a Compton-thin absorber with a column density of 8.0^<+0.6>_<-0: 5>×10^<21> cm^<-2>. There is another, weaker, unabsorbed power-law component that is likely to be due to the primary continuum being electron-scattered into our line-of-sight by a region extended on a scale of hundreds of parsecs. We measure the Thomson depth of the scattering zone to be τ_<es> = 0.072±0.021. There is also optically-thin thermal emission with a temperature of kT = 0.656^<+0.088>_<0.061>keV. We detect an Fe K emission complex which we model with broad and narrow lines and we show that the intensities of the two components are decoupled at a condence level>3σ. We also detect the Fe-Kβ line (corresponding to the narrow Fe-Kα line) with a high signal-to-noise ratio and describe a new robust method to constrain the ionization state of Fe responsible for the Fe-Kα and Fe-Kβ lines that rules out states higher than Fe VII.
- 理論物理学刊行会の論文
- 2007-12-19
著者
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Yaqoob Tahir
Department Of Physics And Astronomy Johns Hopkins University
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Yaqoob Tahir
Department Of Physics And Astronomy Johns Hopkins University:nasa Gsfc
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PTAK Andrew
Department of Physics and Astronomy, Johns Hopkins University
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Ptak Andrew
Department Of Physics And Astronomy Johns Hopkins University
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MURPHY Kendra
Department of Physics and Astronomy, Johns Hopkins University
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Murphy Kendra
Department Of Physics And Astronomy Johns Hopkins University:nasa Gsfc
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YAQOOB Tahir
Department of Physics and Astronomy, Johns Hopkins University:NASA, GSFC
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