English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The detection of a pulsar (PSR) in a tight, relativistic orbit around asupermassive or intermediate mass black hole - such as those in the Galacticcentre or in the centre of Globular clusters - would allow for precision testsof general relativity (GR) in the strong-field, non-linear regime. We present aframework for calculating the theoretical time-frequency signal from a PSR insuch an Extreme Mass Ratio Binary (EMRB). This framework is entirelyrelativistic with no weak-field approximations and so able to account for allhigher-order strong-field gravitational effects, relativistic spin dynamics,the convolution with astrophysical effects and the combined impact on the PSRtiming signal. Specifically we calculate both the spacetime path of the pulsarradio signal and the complex orbital and spin dynamics of a spinning pulsararound a Kerr black hole, accounting for spacetime curvature and framedragging, relativistic and gravitational time delay, gravitational lightbending, temporal and spatial dispersion induced by the presence of plasmaalong the line of sight and relativistic aberration. This then allows for aconsistent time-frequency solution to be generated. Such a framework is key forassessing the use of PSR as probes of strong field GR, helping to inform thedetection of an EMRB system hosting a PSR and, most essentially, for providingan accurate theoretical basis to then compare with observations to testfundamental physics.

Pulsar timing in extreme mass ratio binaries: a general relativistic approach