Journal
PHYSICAL REVIEW D
Volume 101, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.101.124059
Keywords
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Funding
- European Union [749145]
- Science and Technology Facilities Council (STFC) [ST/L000962/1]
- European Research Council [647839]
- Max Planck Society's Independent Research Group Grant
- National Science Foundation [PHY-0757058, PHY-0823459]
- STFC [ST/I006285/1]
- STFC [ST/I006285/1, ST/L000962/1] Funding Source: UKRI
- Marie Curie Actions (MSCA) [749145] Funding Source: Marie Curie Actions (MSCA)
- European Research Council (ERC) [647839] Funding Source: European Research Council (ERC)
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Accurate gravitational-wave (GW) signal models exist for black hole binary (BBH) and neutron-star binary (BNS) systems, which are consistent with all of the published GW observations to date. Detections of a third class of compact-binary systems, neutron-star black hole (NSBH) binaries, have not yet been confirmed, but are eagerly awaited in the near future. For NSBH systems, GW models do not exist across the viable parameter space of signals. In this work we present the frequency-domain phenomenological model, PhenomNSBH, for GWs produced by NSBH systems with mass ratios from equal-mass up to 15, spin on the black hole (BH) up to a dimensionless spin of vertical bar chi vertical bar = 0.5, and tidal deformabilities ranging from 0 (the BBH limit) to 5000. We extend previous work on a phenomenological amplitude model for NSBH systems to produce an amplitude model that is parametrized by a single tidal deformability parameter. This amplitude model is combined with an analytic phase model describing tidal corrections. The resulting approximant is compared to publicly available NSBH numerical-relativity simulations and hybrid waveforms constructed from numerical-relativity simulations and tidal inspiral approximants. For most signals observed by second-generation ground-based detectors, it will be difficult to use the GW signal alone to distinguish single NSBH systems from either BNSs or BBHs, and therefore to unambiguously identify an NSBH system.
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