Killing horizon
= Killing horizon
{wiki}
A Killing horizon is a <null hypersurface> whose null generators are orbits of a <Killing vector field> $K$. On the horizon, $K^b\nabla_bK^a=\kappa K^a$ defines its <surface gravity>.
= Killing horizon
{wiki}
A Killing horizon is a <null hypersurface> whose null generators are orbits of a <Killing vector field> $K$. On the horizon, $K^b\nabla_bK^a=\kappa K^a$ defines its <surface gravity>.