Two Regimes of Trans-Fast MHD Accretion onto a Black Hole

Details Two Regimes of Trans-Fast MHD Accretion onto a Black Hole Two Regimes of Trans-Fast MHD Accretion onto a Black Hole

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.438t&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

The magnetohydrodynamical (MHD) accretion injected from a plasma source with low-velocity must pass through the fast/slow magnetosonic point and the Alfven point, and then falls into the black hole. We present the critical conditions of the MHD accretion in a stationary and axisymmetric black-hole magnetosphere. The main result is the discovery of two separate regimes: ``magnetic-like'' MHD accretion and ``fluid-like'' MHD accretion. For a weak magnetic field limit, the former has no solution, while the latter is coincident with the hydrodynamical case. Transition between these two regimes is discontinuous.

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