Grmhd Simulations Of Misaligned Black Hole Accretion Disks

Details Grmhd Simulations Of Misaligned Black Hole Accretion Disks Grmhd Simulations Of Misaligned Black Hole Accretion Disks

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21930804g&link_type=abstract

American Astronomical Society, AAS Meeting #219, #308.04

Astronomy and Astrophysics

Astronomy

Scientific paper

We present new numerical studies of a black hole accretion disk misaligned with the hole. We use 3D general relativistic magnetohydrodynamics (GRMHD) harm3d to study the dynamics of the accretion flow. For a thick torus, we confirm the results of Fragile et al., that the main disk remained tilted with respected to the hole and in the inner region the materials plunge into the hole from two streams. We find that a dominate m=2 mode forms in the inner region of the disk and extends further out as the tilt increases. We also discuss the properties of the Poynting flux in the misaligned disk system. We also use a general relativistic ray-tracing code to study the radiation properties of these disks. We found that a tilt disk can greatly changes both the imaging and spectrum properties of the inner disk. This suggest that more parameters should be considered when fitting the black hole accretion disk's spectrum and/or images.

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