发表机构
University of Wisconsin–Madison; University of Chicago; Fermi National Accelerator Laboratory（威斯康星大学麦迪逊分校; 芝加哥大学; 费米国家加速器实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究表明，类AXIS的未来X射线仪器对keV尺度暗物质衰变的窄光子线具有高灵敏度，银心观测的预计寿命灵敏度达10^31秒，可在部分质量范围将现有极限提升一个数量级。
AI 中文摘要
高级X射线成像卫星（AXIS）是旨在提升钱德拉X射线天文台与XMM-牛顿望远镜的灵敏度和空间分辨率的任务概念。尽管AXIS未被选中实施，但其概念研究已定义了成熟的仪器设计：在0.3-10 keV能量范围内具备低背景、角秒级成像能力，拥有大有效面积与宽视场。这些能力为未来X射线天文台的暗物质衰变灵敏度提供了有用基准。我们估算了未来类AXIS仪器对keV尺度暗物质衰变产生的窄光子线的探测范围，其中包括类轴子粒子与惰性中微子。针对银心观测，我们得出的预计寿命灵敏度约为10^31秒，在部分keV质量范围内较现有极限提升了一个数量级。
英文摘要
The Advanced X-ray Imaging Satellite (AXIS) was a mission concept designed to improve upon the sensitivity and spatial resolution of the Chandra X-ray Observatory and XMM-Newton. Although AXIS was not selected for implementation, the concept study defined a mature instrument design with low-background, arcsecond imaging over the $0.3$-$10$ keV energy range, a large effective area, and a wide field of view. These capabilities provide a useful benchmark for the dark matter decay sensitivity of future X-ray observatories. We estimate the reach of a future AXIS-like instrument for narrow photon lines from decaying keV-scale dark matter, including axion-like particles and sterile neutrinos. For Galactic center observations, we find projected lifetime sensitivities of order $10^{31}$ s, improving upon existing limits by up to an order of magnitude over part of the keV mass range.
Comments8 pages, 5 figures
