Global three-dimendional magneto-hydrodynamic simulations of black hole accretion disks

Details Global three-dimendional magneto-hydrodynamic simulations of black hole accretion disks Global three-dimendional magneto-hydrodynamic simulations of black hole accretion disks

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asthe..98...83m&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 98, No. 2, p. 83 - 89 (2005)

Astronomy and Astrophysics

Astronomy

Black Holes, Accretion Disks, Magnetohydrodynamics

Scientific paper

We present the results of global three-dimensional magneto-hydrodynamic simulations of black hole accretion disks. Numerical results indicated that initially weak magnetic fields are amplified by magneto-rotational instability (MRI). The amplification of magnetic fields saturates when the magnetic pressure becomes about 10% of the gas pressure. The Maxwell stress generated by the turbulent magnetic field enables mass accretion. X-ray shots observed in Cyg X-1 can be explained by magnetic re-connection taking place in the innermost region of the black hole accretion disk.

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