Isothermal Bondi accretion rate
= Isothermal Bondi accretion rate
{title2=$\dot M=\pi e^{3/2}G^2M^2\rho_\infty/c_s^3$}
The regular spherical isothermal inflow from <mass density> $\rho_\infty$ at rest at infinity has sonic <mass density> $e^{3/2}\rho_\infty$. Combining it with the <Bondi sonic point> and <mass conservation> gives $\dot M=\pi e^{3/2}G^2M^2\rho_\infty/c_s^3$.