Standing Shocks in Trans-Magnetosonic Accretion Flows onto a Black Hole

Details Standing Shocks in Trans-Magnetosonic Accretion Flows onto a Black Hole Standing Shocks in Trans-Magnetosonic Accretion Flows onto a Black Hole

2005-11-08

arxiv.org/abs/astro-ph/0511217v2

Astrophys.J.645:1408-1420,2006

Astronomy and Astrophysics

Astrophysics

22 pages, 10 figures, accepted to ApJ

Scientific paper

10.1086/500107

Fast and slow magnetosonic shock formation is presented for stationary and axisymmetric magnetohydrodynamical (MHD) accretion flows onto a black hole. The shocked black hole accretion solution must pass through magnetosonic points at some locations outside and inside the shock location. We analyze critical conditions at the magnetosonic points and the shock conditions. Then, we show the restrictions on the flow parameters for strong shocks. We also show that a very hot shocked plasma is obtained for a very high-energy inflow with small number density. Such a MHD shock can appear very close to the event horizon, and can be expected as a source of high-energy emissions. Examples of shocked MHD accretion flows are presented in the Schwarzschild case.

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