Understand
We study nonlinear evolutions of binary black hole mergers, uncovering power-law contributions generated by the long-range behaviour of the highly-curved dynamical spacetime.
- The result is achieved by exploiting the strong increase of the tail relevance due to binary eccentricity, recently observed in perturbative evolutions of a small-mass-ratio binary under accurate radiation reaction by Albanesi and collaborators [PhysRevD.108.084037].
- We demonstrate the presence of this enhancement even in the nonlinear case of comparable-mass binary mergers in eccentric orbits, using the public RIT waveform catalog.
- The instantaneous frequency of the simulations displays large oscillations at intermediate to late-times, due to interference terms in the transition between a fast-decaying, constant-frequency quasinormal-mode driven regime, and a power-law, slowly-decaying one.