Adding eccentricity to quasicircular binary-black-hole waveform models

The detection of gravitational-wave signals from coalescing eccentric binary black holes would yield unprecedented information about the formation and evolution compact binaries in specific scenarios, such as dynamical dense stellar clusters three-body interactions. searches by ground-based interferometers, LIGO Virgo, rely on analytical waveform models for quasicircular orbits. Eccentric merger are less developed, only few numerical simulations mergers publicly available, but several inspiral have been developed post-Newtonian expansion. Here we present a novel method to convert dominant quadrupolar mode any circular binary-black-hole model into an model. First, using simulations, examine additional amplitude frequency modulations that not their counterparts. Subsequently, identify suitable descriptions those interpolate key parameters twelve designated our training dataset. This allows us reconstruct modulated phase up mass ratio 3 eccentricity 0.2. We find minimum overlap new with is around 0.98 over all test dataset scaled 50M$_\odot$ black-hole starting at 35 Hz aLIGO A+ design sensitivity. A Python package \pyrex easily carries out computation this method.