Axion minicluster halo limits from wide binary disruption

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy Physical Review D Pub Date : 2025-02-19 DOI:10.1103/physrevd.111.043042

Zihang Wang, Yu Gao

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Abstract

Axionic dark matter can form miniclusters and minicluster halos (MCHs) from inhomogeneities in the early Universe. If MCHs are sufficiently massive, then their existence can be revealed by small-scale gravitational tidal perturbation to halolike wide binary star systems in the Galaxy. The observed population of the Milky Way’s wide-separation binaries with a≳0.1 parsec offer a sensitive test to dynamic evaporation from MCHs. Considering data from recent GAIA observations, we derive significant constraints on the MCH fraction of the Galactic dark matter halo. For several scenarios including dense MCHs and isolated minicluster models, these limits will apply to axionlike particles in the mass range ma∼10−15–10−12 eV and ma∼10−19–10−16 eV, respectively.

Published by the American Physical Society

2025

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轴子微簇晕限制了宽双星分裂

轴子暗物质可以在早期宇宙的不均匀性中形成微星团和微星晕（MCHs）。如果MCHs足够大，那么它们的存在可以通过对银河系中光环状宽双星系统的小规模引力潮汐扰动来揭示。观测到的银河系宽距双星群（约0.1秒差距）为MCHs的动态蒸发提供了一个灵敏的测试。考虑到最近的GAIA观测数据，我们得出了银河系暗物质晕的MCH部分的重要限制。对于包括密集MCHs和孤立小簇模型在内的几种情况，这些限制将分别适用于质量范围为ma ~ 10−15-10−12 eV和ma ~ 10−19-10−16 eV的轴子类粒子。2025年由美国物理学会出版

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.