银河系中心伽玛射线观测对类轴子粒子的约束

IF 5.9 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Ben-Yang Zhu, Xiaoyuan Huang and Peng-Fei Yin
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引用次数: 0

摘要

来自银河系中心(GC)区域的高能光子有可能经历显著的光子-轴子样粒子(ALP)振荡效应,这主要是由该区域强磁场的存在引起的。通过成像大气切伦科夫望远镜进行的观测已经探测到来自一个名为HESS J1745-290的点源的高能伽马射线,该点源位于离GC很近的地方。据推测,这一来源与超大质量黑洞人马座A*有关。GC区包含多种结构,包括分子云和非热丝,这些结构共同导致了该区域复杂的磁场构型。利用GC区域特有的磁场模型,我们探索了HESS J1745-290伽玛射线谱中的光子- alp振荡现象。我们的分析没有揭示光子- alp振荡的任何可识别的特征,产生了重要的约束,作为对河外源在广泛参数区域的伽马射线观测的补充。银河系外磁场模型产生的不确定性对我们的结果影响不大,除了10-7 eV左右的ALP质量,因为主要影响来自内部GC区域的强磁场强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Constraints on axion-like particles from the gamma-ray observation of the Galactic Center
High energy photons originating from the Galactic Center (GC) region have the potential to undergo significant photon-axion-like particle (ALP) oscillation effects, primarily induced by the presence of intense magnetic fields in this region. Observations conducted by imaging atmospheric Cherenkov telescopes have detected very high energy gamma-rays originating from a point source known as HESS J1745-290, situated in close proximity to the GC. This source is conjectured to be associated with the supermassive black hole Sagittarius A*. The GC region contains diverse structures, including molecular clouds and non-thermal filaments, which collectively contribute to the intricate magnetic field configurations in this region. By utilizing a magnetic field model specific in the GC region, we explore the phenomenon of photon-ALP oscillations in the gamma-ray spectrum of HESS J1745-290. Our analysis does not reveal any discernible signature of photon-ALP oscillations, yielding significant constraints that serve as a complement to gamma-ray observations of extragalactic sources across a broad parameter region. The uncertainties arising from the outer Galactic magnetic field models have minor impacts on our results, except for ALP masses around 10-7 eV, as the dominant influence originates from the intense magnetic field strength in the inner GC region.
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来源期刊
Journal of Cosmology and Astroparticle Physics
Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理
CiteScore
10.20
自引率
23.40%
发文量
632
审稿时长
1 months
期刊介绍: Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.
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