发表机构
The University of Hong Kong; Hong Kong Institute for Astronomy and Astrophysics, The University of Hong Kong; INAF Osservatorio Astrofisico di Arcetri; Università degli Studi di Firenze; Istituto Nazionale di Fisica Nucleare, Sezione di Firenze; University of California, Santa Cruz; Dunlap Institute for Astronomy and Astrophysics, University of Toronto; David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto; Shanghai Astronomical Observatory, Chinese Academy of Sciences; Center for Astrophysics | Harvard & Smithsonian（香港大学; 香港大学天文与天体物理研究所; 意大利国家天体物理研究所阿切特里天文台; 佛罗伦萨大学; 意大利国家核物理研究所佛罗伦萨分部; 加州大学圣克鲁兹分校; 多伦多大学邓普勒天文与天体物理研究所; 多伦多大学大卫·A·邓普勒天文与天体物理系; 中国科学院上海天文台; 哈佛-史密森尼天体物理中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用17台望远镜的多波段数据，在Mouse脉冲星风云中于3.7 GHz处发现光谱断裂及Δα=0.65±0.05的谱指数变化，归因于注入粒子分布的内在截断，揭示轻子特征能量或终止激波后的能量耗散。
AI 中文摘要
弓形激波脉冲星风云（PWNe）是当超音速脉冲星的出流被周围星际介质约束时形成的同步辐射源。这些源由新注入的粒子主导，因此为研究相对论性出流中的粒子加速提供了独特的实验室。Mouse是典型的弓形激波脉冲星风云，在射电和X射线波段非常明亮，使得详细的多波段光谱建模成为可能。利用17台望远镜的数据，Mouse在118 MHz至353 GHz的频率范围内被探测到，覆盖超过3个数量级的频率，并在0.5至30 keV的X射线波段被探测到。在3.7 GHz处识别出一个清晰的光谱断裂。射电光谱在低频处呈现上升趋势，在断裂处达到峰值，然后下降。我们发现跨越断裂的光谱指数变化为Δα=0.65±0.05。我们将此归因于注入粒子分布中的内在截断或变陡。这可能表明离开脉冲星磁层的轻子的特征能量，或者粒子穿越终止激波后的能量耗散。
英文摘要
Bow-shock pulsar wind nebulae (PWNe) are synchrotron sources formed when the outflow of supersonic pulsars is confined by the surrounding interstellar medium. These sources are dominated by freshly injected particles, thus providing a unique laboratory for studying particle acceleration in relativistic outflows. The Mouse is a prototypical bow-shock PWN and is bright in the radio and X-ray bands, enabling detailed multi-wavelength spectral modeling. With data from 17 telescopes, the Mouse is detected from 118 MHz to 353 GHz, covering over 3 decades in frequency, and in X-rays from 0.5 to 30 keV. A clear spectral break is identified at 3.7 GHz. The radio spectrum exhibits a rising trend at low frequency, peaks at the break, and then declines. We find a change in spectral index $Δα=0.65\pm0.05$ across the break. We attribute this to an intrinsic cutoff or steepening in the injected particle distribution. This could indicate the characteristic energy of leptons leaving the pulsar magnetosphere, or energy dissipation after the particles cross the termination shock.
Comments18 pages, 10 figures, 5 tables
Journal refJournal of High Energy Astrophysics 56 (2027) 100750
DOI：10.1016/j.jheap.2026.100750
