Orbital spin dynamics of a millisecond pulsar around a massive black hole with an general mass quadrupole

Abstract

We investigate the spin dynamics of a millisecond pulsar (MSP) in compact orbit around a Kerr-like massive black hole with an general mass quadrupole. We use the Mathisson-Papetrou-Dixon formulation to compute the orbital and spin evolution of the MSP, accounting for the non-linear interaction of the pulsar's energy-momentum tensor on the background spacetime metric. We investigate how the MSP spin and BH quadrupole moment manifest in the pulsar spin-orbital dynamics. We discuss the astrophysical observational implications of these spin and orbital dynamics on the timing of a radio pulsar in an Extreme Mass Ratio Binary, e.g. a Galactic Centre pulsar. In particular, notable timing variations in the Einstein delay and Roemer delay are observed, along with modifications to the pulsar pulse profile.

11 pages, 11 figures, accepted for publication in MNRAS

References in corpus (11)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• The Confrontation between General Relativity and Experiment
• Dynamics of Extended Spinning Masses in a Gravitational Field
• Evolution of small-mass-ratio binaries with a spinning secondary
• Self-force corrections to the periapsis advance around a spinning black hole
• Observing the Galaxy's massive black hole with gravitational wave bursts
• Dark matter concentrations in galactic nuclei according to polytropic models
• Fast Spinning Pulsars as Probes of Massive Black Holes' Gravity
• Spin dynamics of a millisecond pulsar orbiting closely around a massive black hole
• Antigravity: Spin-gravity coupling in action
• Gravitational Burst Radiation from Pulsars in the Galactic centre and stellar clusters

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• Radio timing in a millisecond pulsar-extreme/intermediate mass ratio binary system
• Relativistic scattering of a fast spinning neutron star by a massive black hole
• Astrophysics with the Laser Interferometer Space Antenna
• RelativisticDynamics.jl: Relativistic Spin-Orbital Dynamics in Julia