PreprintCC BY 4.0arXiv
Neutron Star--Primordial Black Hole Binaries: Dynamical Tides, Resonance Locking, and Gravitational Waves
Abstract
The orbital evolution of a neutron star and a much lower-mass primordial black hole can differ strikingly from that of typical compact binaries. Dynamical tides, analogous to those in the Solar System's giant planet-moon systems, can accelerate inspiral or induce outspiral, depending on the orbital configuration. We show how gravitational-wave emission mediates this evolution when neutron star modes remain locked in resonance with the orbit. These effects may leave observable signatures in pulsar timing or gravitational waves.
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BibTeX
@misc{legred2026neutron,
title = {{Neutron Star--Primordial Black Hole Binaries: Dynamical Tides, Resonance Locking, and Gravitational Waves}},
author = {Isaac Legred and Nicolás Yunes},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.33314},
eprint = {2610.33314},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.33314},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Neutron Star--Primordial Black Hole Binaries: Dynamical Tides, Resonance Locking, and Gravitational Waves
AU - Isaac Legred
AU - Nicolás Yunes
PY - 2026
DA - 2026/10/23
PB - arXiv
DO - 10.48550/arxiv.2610.33314
UR - https://arxiv.org/abs/2610.33314
AB - The orbital evolution of a neutron star and a much lower-mass primordial black hole can differ strikingly from that of typical compact binaries. Dynamical tides, analogous to those in the Solar System's giant planet-moon systems, can accelerate inspiral or induce outspiral, depending on the orbital configuration. We show how gravitational-wave emission mediates this evolution when neutron star modes remain locked in resonance with the orbit. These effects may leave observable signatures in pulsar timing or gravitational waves.
ER -