Frequency domain reduced order model of aligned-spin effective-one-body waveforms with generic mass-ratios and spins

I provide a frequency domain reduced order model (ROM) for the aligned-spin effective-one-body model ``SEOBNRv2'' for data analysis with second- and third-generation ground-based gravitational wave (GW) detectors. SEOBNRv2 models the dominant mode of the GWs emitted by the coalescence of black hole binaries. The large physical parameter space (dimensionless spins $\ensuremath{-}1\ensuremath{\le}{\ensuremath{\chi}}_{i}\ensuremath{\le}0.99$ and symmetric mass ratios $0.01\ensuremath{\le}\ensuremath{\eta}\ensuremath{\le}0.25$) requires sophisticated reduced order modeling techniques, including patching in the parameter space and in frequency. I find that the time window over which the inspiral-plunge and the merger-ringdown waveform in SEOBNRv2 are connected has a discontinuous dependence on the parameters when the spin parameter $\ensuremath{\chi}=0.8$ or the symmetric mass ratio $\ensuremath{\eta}\ensuremath{\sim}0.083$. This discontinuity increases resolution requirements for the ROM. The ROM can be used for compact binary systems with total masses of $2{M}_{\ensuremath{\bigodot}}$ or higher for the Advanced LIGO design sensitivity and a 10 Hz lower cutoff frequency. The ROM has a worst mismatch against SEOBNRv2 of $\ensuremath{\sim}1%$, but in general mismatches are better than $\ensuremath{\sim}0.1%$. The ROM is crucial for key data analysis applications for compact binaries, such as GW searches and parameter estimation carried out within the LIGO Scientific Collaboration.