Second order perturbations of a Schwarzschild black hole: Inclusion of odd parity perturbations (Q1596242)

We consider perturbations of a Schwarzschild black hole that can be of both even and odd parity, keeping terms up to second order in perturbation theory, for the \(l=2\) axisymmetric case. We develop explicit formulae for the evolution equations and radiated energies and waveforms using the Regge-Wheeler-Zerilli approach. This formulation is useful, for instance, for the treatment in the ''close limit approximation'' of the collision of counterrotating black holes.