Black hole accretion in scalar-tensor-vector gravity

Understand

We examine the accretion of matter onto a black hole in scalar--tensor--vector gravity (STVG) also known as modified gravity (MOG).

• The gravitational constant is $G=G_{N} (1 + \alpha)$ where $\alpha$ is a parameter taken to be constant for static black holes in the theory.
• The MOG black hole is spherically symmetric and characterised by two event horizons.
• The matter falling into the black hole obeys the polytrope equation of state and passes through two critical points before entering the outer horizon.