Work

Neutron Star--Primordial Black Hole Binaries: Dynamical Tides, Resonance Locking, and Gravitational Waves

Year: 2026

Type: preprint

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.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.33314

Authors: Legred, Isaac, Yunes, Nicolás

Institution: University of Illinois Urbana-Champaign

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, National Aeronautics and Space Administration, Science Foundation Ireland

Awards: Probing Extreme Gravity with Gravitational Waves, Frameworks: MUSES, Modular Unified Solver of the Equation of State, G643508668, G90037819

OpenAlex ID: W7223922865

Cites: 48

Cited by:

Related to: 10