The Innermost Extremes of Black Hole Accretion

Abstract

The inner 20 gravitational radii around the black hole at the centre of luminous Active Galactic Nuclei and stellar mass Black Hole Binaries are now being routinely mapped by X-ray spectral-timing techniques. Spectral blurring and reverberation of the reflection spectrum are key tools in this work. In the most extreme AGN cases with high black hole spin, when the source appears in a low state, observations probe the region within 1 gravitational radius of the event horizon. The location, size and operation of the corona, which generates the power-law X-ray continuum, are also being revealed.

6 pages. 12 figures, in press Astronomical Notes (Proc. XMM-Newton 2015 Science Workshop)

References in corpus (7)

• X-ray reverberation around accreting black holes
• The NuSTAR spectrum of Mrk 335: Extreme relativistic effects within 2 gravitational radii of the event horizon?
• NuSTAR and XMM-Newton Observations of NGC 1365: Extreme Absorption Variability and a Constant Inner Accretion Disk
• A selection effect boosting the contribution from rapidly spinning black holes to the Cosmic X-ray Background
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• New Constraints on the Black Hole Low/Hard State Inner Accretion Flow with NuSTAR
• The Compton hump and variable blue wing in the extreme low-flux NuSTAR observations of 1H0707-495

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