Dynamical Evolution of the Shock Cone around $4D$ Einstein-Gauss Bonnet Rotating Black Hole

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In this paper, a Bondi-Hoyle accretion onto the rotating black hole in Einstein-Gauss Bonnet gravity is studied.

• By injecting the gas from the upstream region of the computational domain, we have found the occurrence of the stable shock cones in the downstream region.
• The dynamical structures and oscillation properties of these shock cones strongly depend on the black hole spin parameter $a$ and Gauss-Bonnet coupling constant alpha.
• It is found that the various values of alpha can lead the different amounts of matter to pile up close to the black hole horizon, higher alpha causes bigger oscillation amplitude in the mass accretion rate, and the required time to reach the steady-state is getting smaller with the increase in alpha.