AI 中文总结
研究通过对选定AGN和星系团对进行甚高能伽马射线观测评估对类轴子暗物质的敏感性，采用叠加分析方法，利用模拟数据评估性能，可探索neV质量范围的ALP暗物质参数空间。
AI 中文摘要
类轴子粒子（ALPs）作为轻暗物质候选者被积极搜寻。它能与光子耦合，在外部磁场中产生光子振荡。若耦合足够强，会在天体物理源的伽马射线谱中留下独特谱不规则性。本文利用位于星系团后方的选定活动星系核（AGN）的叠加观测，对探测ALP - 光子相互作用的敏感性进行前瞻性研究。通过对多个AGN - 星系团对进行叠加分析，控制预期的ALP诱导谱模式预测并提高对不规则性的敏感性。利用模拟数据评估该方法性能，其能探索以前未涉及的neV质量范围内的ALP暗物质参数空间。
英文摘要
Axion-Like-Particles (ALPs) are pseudo-scalar particles actively searched as light dark matter candidates. ALPs can couple to photons which give rise to the possibility of oscillations with photons in an external magnetic field. If sufficiently strong, this coupling can imprint distinctive spectral irregularities in the gamma ray spectrum of astrophysical sources. We present a prospective study on the sensitivity of probing ALP-photon interactions using stacked observations of selected active galactic nuclei (AGNs) located behind galaxy clusters. The ALP-photon conversion in cluster magnetic fields produces absorption-like features in AGN spectra that are difficult to predict for individual sources. To address this, we apply a stacking analysis of multiple AGN-cluster pairs, yielding a controlled prediction of the expected ALP induced spectral patterns and enhancing the sensitivity to such irregularities. Using simulated data for selected hard-spectrum Fermi/LAT AGNs that can be observed by Imaging Atmospheric Cherenkov Telescopes such as H.E.S.S., we evaluate the performance of this method. The combination of mock IACT observations with our stacking approach enable exploration of the previously uncharted ALP dark matter parameter space in the neV mass range.
Comments5 pages, 3 figures. Contribution to the 2026 VHEPU session of the 60th Rencontres de Moriond
