Iron and Nickel properties in the X-ray reflecting region of the Circinus Galaxy

Abstract

We discuss the iron and nickel properties in the nuclear X-ray reflecting region of the Circinus Galaxy, studied with XMM-Newton. The main results are: a) from the depth of the Fe Kalpha edge, a value of A_Fe=1.7 in number with respect to the cosmic value (as for Anders & Grevesse 1989) is measured, if the (not directly visible) illuminating spectrum is assumed to be that measured by BeppoSAX. If the slope of the primary power law is left free to vary, a steeper spectrum and a lower iron abundance (about 1.2) are found. b) From the Ni to Fe Kalpha lines flux ratio, a nickel-to-iron abundance ratio of 0.055-0.075 is found. c) The Fe Kbeta/Kalpha flux ratio is slightly lower than expected, possibly due to a mild ionization of iron (which however cannot be much more ionized than X). d) The presence of the Fe Kalpha Compton Shoulder, already discovered by Chandra, is confirmed, its relative flux implying Compton-thick matter. This further supports the identification of the reflecting region with the absorber.

To appear in MNRAS pink pages

References in corpus (5)

• A Warped Accretion Disk and Wide Angle Outflow in the Inner Parsec of the Circinus Galaxy
• Changing look: from Compton-thick to Compton-thin, or the re-birth of fossil AGN
• The iron Kalpha Compton Shoulder in transmitted and reflected spectra
• The properties of the absorbing and line emitting material in IGR J16318-4848
• Flux and spectral variations in the Circinus Galaxy

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