Efficient fully precessing gravitational waveforms for binaries with neutron stars

Abstract

We construct an efficient frequency domain waveform for generic circular compact object binaries that include neutron stars. The orbital precession is solved on the radiation reaction timescale (and then transformed to the frequency domain), which is used to map the non-precessional waveform from the source frame of the binary to the lab frame. The treatment of orbital precession is different from that for precessional binary black holes, as ${\chi }_{\mathrm{eff}}$ is no longer conserved due to the spin-induced quadrupole moments of neutron stars. We show that the new waveform achieves $\le 10^{-4}$ mismatch compared with waveforms generated by numerically evolved precession for neutron star-black hole systems for $\ge 90\%$ configurations with component mass/spin magnitude assumed in the analysis and randomized initial spin directions. We expect this waveform to be useful to test the nature of the mass-gap objects similar to the one discovered in GW 190814 by measuring their spin-induced quadrupole moments, as it is possible that these mass-gap objects are rapidly spinning. It is also applicable for the tests of black hole mimickers in precessional binary black hole events, if the black hole mimicker candidates have nontrivial spin-induced quadrupole moments.

Corrected minor typos and a typo in Fig 9 resulting in the incorrect placement in the images

References in corpus (10)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• Constraining neutron star tidal Love numbers with gravitational wave detectors
• GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
• Analysis of spin precession in binary black hole systems including quadrupole-monopole interaction
• A lower bound on the maximum mass if the secondary in GW190814 was once a rapidly spinning neutron star
• Effective potentials and morphological transitions for binary black-hole spin precession
• Mass-gap extreme mass ratio inspirals

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• Dynamical tides during the inspiral of rapidly spinning neutron stars: Solutions beyond mode resonance
• New gravitational waveform model for precessing binary neutron stars with double-spin effects
• Effect of double spin-precession and higher harmonics on spin-induced quadrupole moment measurements
• Probing Spin-Induced Quadrupole Moments in Precessing Compact Binaries
• Inferring spin tilts of binary black holes at formation with plus-era gravitational wave detectors