发表机构
Institute of Physics, University of Belgrade（贝尔格莱德大学物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究分析在仙女座星系M31黑洞周围暗物质尖峰中，WIMP湮灭产生的微波同步辐射，并评估ALMA的探测能力，可探测质量达1 TeV的WIMP。
AI 中文摘要
本研究分析了在仙女座星系M31的超大质量黑洞（SMBH）周围的暗物质（DM）密度尖峰中，弱相互作用大质量粒子（WIMPs）在微波波段的探测前景。WIMP湮灭产生相对论性电子和正电子，这些粒子在吸积流介质的强磁场中于微波频率产生同步辐射。本文模拟了该辐射的特性及其对暗物质和介质参数的依赖性。估算了阿塔卡马大型毫米波/亚毫米波阵列（ALMA）对该辐射及其底层WIMP参数的灵敏度。结果表明，在现实的尖峰和晕密度分布下，M31*在微波波段是一个独特的目标，其暗物质尖峰信号可以被探测到。在这种情况下，ALMA仅需10至100小时的曝光时间，即可探测到质量高达约1 TeV的热s波湮灭WIMP。乐观的参数配置可能允许探测所有质量高达100 TeV的WIMP。文中还讨论了相关的系统不确定性。
英文摘要
This work analyzes the detection prospects for weakly interacting massive particles (WIMPs) in dark matter (DM) density spike around the supermassive black hole (SMBH) in Andromeda galaxy M31 in microwave band. WIMP annihilation produces relativistic electrons and positrons, which generate the synchrotron emission in strong magnetic field of the accretion flow medium at microwave frequencies. Properties of this emission, as well as their dependence on DM and medium parameters, were modeled. Atacama Large Millimeter Array (ALMA) sensitivity to this emission and underlying WIMP parameters was estimated. It was obtained that M31* in microwave band represents the unique target, where DM spike signal can be detected in case of realistic spike and halo density profiles. In such case ALMA may reach the thermal s-wave annihilating WIMPs with masses up to around 1 TeV with just 10--100 hours exposure. Optimistic parameter configurations may allow probing all possible WIMP masses up to 100 TeV. Related systematic uncertainties are discussed.
Comments29 pages, 5 figures, 87 references, submitted to JCAP, continues the work arXiv:2512.10923
