Kimpson, T;
Wu, K;
Zane, S;
(2020)
Orbital spin dynamics of a millisecond pulsar around a massive black hole with an general mass quadrupole.
Monthly Notices of the Royal Astronomical Society
, 497
(4)
pp. 5421-5431.
10.1093/mnras/staa2103.
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Abstract
We investigate the spin dynamics of a millisecond pulsar (MSP) in compact orbit around a Kerr-like massive BH 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 space–time 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.
| Type: | Article |
|---|---|
| Title: | Orbital spin dynamics of a millisecond pulsar around a massive black hole with an general mass quadrupole |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/staa2103 |
| Publisher version: | https://doi.org/10.1093/mnras/staa2103 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | black hole physics, gravitation, relativistic processes, pulsars: general |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10105042 |
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