Geodesic model complience with the frequencies of the observed X-ray quasi-period oscillations of XTE J1807-294

TL;DR

This paper evaluates seven geodesic models to determine their effectiveness in explaining the observed X-ray quasi-periodic oscillations of the accreting millisecond pulsar XTE J1807-294, aiming to infer its main parameters.

Contribution

It compares multiple geodesic models to assess their suitability in describing the pulsar's properties based on X-ray oscillation data.

Findings

Certain models better fit the observed oscillations.

Constraints on neutron star mass and angular momentum are derived.

Model performance varies across different geodesic assumptions.

Abstract

The investigation of the data for quasi-periodic pulsations observed in the X-ray spectra of the accreting millisecond pulsar XTEJ 1807-294 allows some conclusions to be made about its main parameters - mass and angular momentum. Seven different geodesic models - namely RP, RP1, RP2, TP, TP1, WD and TD are applied in attempt to assess their ability to describe the properties of the central neutron star.