How the effects of resonant absorption on black hole reflection spectra can mimic high-velocity outflows

Abstract

Narrow absorption lines seen in the 2-10 keV spectra of active galaxies and Galactic black holes are normally attributed to iron in high velocity outflows or inflows. We consider the possibility that such features could arise naturally in the accretion disc. Resonant absorption by highly ionised iron (e.g. Fe XXVI and Fe XXV) in an optically-thin plasma that is located above the disc and rotating with it could reproduce narrow features in the reflection component of the spectrum as it emerges from the disc. Depending on the inclination of the disc and the exact geometry of the hot plasma (e.g. does it blanket the disc or a ring) apparently narrow absorption features could be detected between 4-10 keV. Such an explanation requires no high velocity outflow/inflow and is consistent with a reflection-based interpretation for accreting black holes systems.

6 pages. Accepted for publication in MNRAS Letters

References in corpus (7)

• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Constraining Black Hole Spin Via X-ray Spectroscopy
• The Accretion Disk Wind in the Black Hole GRO J1655-40
• A Compton-thick Wind in the High Luminosity Quasar, PDS 456
• Relativistic blue- and red-shifted absorption lines in AGNs
• Evidence for relativistic features in the X-ray spectrum of Mrk 335
• On the evidence for narrow, relativistically shifted X-ray lines

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