Building surrogate model of spinning binary black hole coalescence using perturbation theory waveforms

Accurate waveform models of the complete inspiral-merger-ringdown waveform of binary black hole (BBH) systems are crucial for detection and characterization. Surrogate models of non-spinning BBH merger based on point-particle black hole perturbation theory (ppBHPT) waveforms are proven to be efficient and reliable for comparable to large mass ratios systems. In this study, we have extended BHPTNRSur1dq1e4 surrogate model to incorporate spin on the primary black hole, aligned or anti-aligned with the orbital angular momentum of the binary. Our model is trained with ppBHPT waveform, covering mass ratios ranging from q=3 to q=1000 and spin magnitude on primary from 0 to 0.8. Our model includes a total of 8 modes up to ell=4. Similar to the previous model, after a simple calibration technique with spin-aligned numerical relativity waveforms our model performed extremely well in the comparable mass ratio regime.