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Constraining the Properties of the Thermonuclear Burst Oscillation Source XTE J1814-338 Through Pulse Profile Modelling

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arxiv 2405.10717 v2 pith:EQ75TAXW submitted 2024-05-17 astro-ph.HE

Yves Kini , Tuomo Salmi , Serena Vinciguerra , Anna L. Watts , Anna Bilous , Duncan K. Galloway , Emma van der Wateren , Guru Partap Khalsa
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Slavko Bogdanov Johannes Buchner Valery Suleimanov
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classification astro-ph.HE
keywords burstj1814-338modellingpropertiesspotthermonuclearmodeloscillation
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abstract

Pulse profile modelling (PPM) is a comprehensive relativistic ray-tracing technique employed to determine the properties of neutron stars. In this study, we apply this technique to the Type I X-ray burster and accretion-powered millisecond pulsar XTE J1814-338, extracting its fundamental properties using PPM of its thermonuclear burst oscillations. Using data from its 2003 outburst, and a single uniform temperature hot spot model, we infer XTE J1814-338 to be located at a distance of $7.2^{+0.3}_{-0.4}$ kpc, with a mass of $1.21^{+0.05}_{-0.05}$ M$_\odot$ and an equatorial radius of $7.0^{+0.4}_{-0.4}$ km. Our results also offer insight into the time evolution of the hot spot but point to some potential shortcomings of the single uniform temperature hot spot model. We explore the implications of this result, including what we can learn about thermonuclear burst oscillation mechanisms and the importance of modelling the accretion contribution to the emission during the burst.

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Cited by 3 Pith papers

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  1. Systematic study of the morphology and length of slow stable hybrid star branches

    astro-ph.HE 2026-06 unverdicted novelty 7.0 of 10

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  2. Effect of Dark matter and $\sigma$-cut potential on radial and non-radial oscillation modes in neutron stars

    astro-ph.HE 2025-07 conditional novelty 4.0 of 10

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  3. Probing Neutron Star Interiors and the Properties of Cold Ultra-dense Matter with the SKAO

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    SKAO's sensitivity, surveys and sub-arraying will deliver tighter NS mass, MoI, spin, glitch and precession constraints that, with X-ray and GW data, probe cold ultra-dense matter.

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