New probe of dark matter-baryon interactions in compact stellar systems

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy Physical Review D Pub Date : 2025-03-05 DOI:10.1103/physrevd.111.l061302

Yang Ma, Zihui Wang

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Abstract

We investigate the astrophysical consequences of an attractive long-range interaction between dark matter and baryonic matter. Our study highlights the role of this interaction in inducing dynamical friction between dark matter and stars, which can significantly influence the evolution of compact stellar systems. Using the star cluster in Eridanus II as a case study, we derive a new stringent upper bound on the interaction strength α˜≤314.5 for the interaction range λ=1 pc. This constraint is independent of the dark matter mass and can improve the existing model-independent limits on α˜ by a few orders of magnitude. Furthermore, we observe that the constraint is insensitive to the mass of the stellar system and the dark matter density in the stellar system as long as the system is dark matter dominated. This new approach can be applied to many other stellar systems, and we obtain comparable constraints from compact stellar halos observed in ultrafaint dwarf galaxies.

Published by the American Physical Society

2025

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致密恒星系统中暗物质-重子相互作用的新探测

我们研究了暗物质和重子物质之间有吸引力的远距离相互作用的天体物理学后果。我们的研究强调了这种相互作用在诱导暗物质和恒星之间的动态摩擦中的作用，这可以显著影响致密恒星系统的演化。以Eridanus II中的星团为例，推导出在λ= 1pc的相互作用范围内，相互作用强度α ~≤314.5的新的严格上界。这种约束与暗物质质量无关，可以将现有的与模型无关的α ~限制提高几个数量级。此外，我们观察到，只要系统中暗物质占主导地位，约束对恒星系统的质量和恒星系统中的暗物质密度不敏感。这种新方法可以应用于许多其他恒星系统，我们从超微小矮星系中观察到的致密恒星晕中获得了类似的约束。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.