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XTE J1814-338 as a dark matter admixed neutron star

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arxiv 2411.17105 v2 pith:GV2V7GKK submitted 2024-11-26 astro-ph.HE hep-ph

classification astro-ph.HEhep-ph
keywords j1814-338neutronpropertiesdarkmatterobjectodotphysical
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abstract

The existence of the ultracompact object XTE J1814-338, with an inferred mass and radius of $M$ = 1.21 $\pm$ 0.05 $M_\odot$ and R = 7.0 $\pm$ 0.4 km, presents a great challenge for the theory of neutron stars. Within this context, we revisit the theory of dark-matter-admixed neutron stars and infer the physical properties of this compact object, such as the Fermi momentum of dark matter necessary to compress the star at such low radius, its equation of state, speed of sound, and some macroscopic properties, such as the moment of inertia and the dimensionless tidal parameter. We also compare the physical properties of the XTE J1814-338 with other pulsars, such as the canonical 1.4 M$_\odot$, the PSR J0740 + 6620, and the HESS J1731-347.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A self-consistent Higgs-portal framework for dark matter--admixed neutron stars: Collider-motivated benchmarks meet multimessenger constraints

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    Adding heavy dark matter to neutron stars via nχ=FχnB softens the equation of state and lowers the maximum mass, but the vector interaction invoked is numerically negligible.

  2. Core-Corona Decomposition of Very Compact (Neutron) Stars: Accounting for Current Data of XTE J1814-338

    astro-ph.HE 2025-06 conditional novelty 4.0 of 10

    For the compact pulsar XTE J1814-338, the required core inferred from standard outer-matter physics is large and dense, and simple standard-matter core models fail to reproduce it.

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