Accretion and Ejection--The GR/MHD View

Astronomy and Astrophysics – Astrophysics

Scientific paper

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to appear in Proceedings of The Multicoloured Landscape of Compact Objects and their Explosive Origins, Cefalu, 2006

Scientific paper


The inward flow of matter through accretion disks is driven by MHD turbulence. Global general relativistic MHD simulations shed quantitative light on this process, revealing a number of aspects of accretion previously unrecognized. Among them are strong stresses in the marginally stable and plunging regions near the black hole and electromagnetically-dominated conical relativistic jets that can form spontaneously from the accretion flow. The energy release associated with both of these effects can significantly augment the classical energy-release estimates based on purely hydrodynamic models.

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