XTE J1814-338是一颗暗物质混合中子星

IF 5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics of the Dark Universe Pub Date : 2025-04-13 DOI:10.1016/j.dark.2025.101922

Luiz L. Lopes , Adamu Issifu

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引用次数: 0

摘要

超致密天体XTE J1814-338的存在对中子星理论提出了巨大的挑战，其质量和半径M = 1.21±0.05M⊙,R = 7.0±0.4 km。在这种背景下，我们重新审视了暗物质混合中子星的理论，并推断了这个致密物体的物理性质，如暗物质的费米动量，它的状态方程，声速，以及一些宏观性质，如转动惯量和无量纲潮汐参数。我们还比较了XTE J1814-338与其他脉冲星的物理性质，如规范的1.4 M⊙、PSR J0740 + 6620和HESS J1731-347。

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XTE J1814-338 as a dark matter admixed neutron star

The existence of the ultracompact object XTE J1814-338, with an inferred mass and radius of

M

= 1.21

\pm 0.05 M_{⊙}

and R = 7.0 ± 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

_{⊙}

, the PSR J0740 + 6620, and the HESS J1731-347.

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来源期刊

Physics of the Dark Universe ASTRONOMY & ASTROPHYSICS-

CiteScore

9.60

自引率

7.30%

发文量

118

审稿时长

61 days

期刊介绍： Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact. The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.