AI 中文总结
本研究在统一传播框架下，结合GALPROP模型与格林函数方法，探讨邻近脉冲星等天体物理源对宇宙射线轻子能谱TeV结构的贡献，为区分其与暗物质等奇特解释提供诊断依据。
AI 中文摘要
对高能宇宙射线电子与正电子的精确测量揭示了难以用单一平滑幂律背景描述的能谱结构。PAMELA与AMS-02测得的正电子流强占比上升、ATIC报告的全电子超出，以及DAMPE测得的高精度全电子能谱，促使人们从邻近天体物理加速器到暗物质湮灭或衰变等角度展开解释。本研究在统一传播框架下重新探讨传统弥散电子背景及邻近脉冲星的可能贡献：弥散分量采用经宇宙射线核与弥散伽马射线观测校准的GALPROP构型建模；随后利用含辐射损失的邻近离散源格林函数解，研究具有爆发式与连续式注入历史的脉冲星贡献，包括随机逆康普顿冷却对传播后能谱的影响；还以DAMPE最高能数据点为例，对比脉冲星与超新星遗迹类爆发源的可能局域源贡献。这类结构的能谱形状为区分物理上合理的邻近源特征与更奇特的解释提供了有用诊断依据。
英文摘要
Precise measurements of high-energy cosmic-ray electrons and positrons have revealed spectral structures that are difficult to capture with a single smooth power-law background. The rising positron fraction measured by PAMELA and AMS-02, together with the all-electron excess reported by ATIC and the high-precision all-electron spectrum measured by DAMPE, has motivated interpretations ranging from nearby astrophysical accelerators to dark-matter annihilation or decay. In this work we revisit the conventional diffuse electron background and the possible contribution from nearby pulsars in a common propagation framework. The diffuse component is modeled with GALPROP configurations calibrated by cosmic-ray nuclei and diffuse gamma-ray observations. We then use the Green-function solution for nearby discrete sources with radiative losses to study pulsar contributions with both burst-like and continuous injection histories, including the effect of stochastic inverse-Compton cooling on the propagated spectra. We also use the highest-energy DAMPE data points as an illustrative case to compare possible local-source contributions from pulsars and supernova-remnant-like burst sources. The spectral shape of such features provides a useful diagnostic for distinguishing physically plausible nearby-source features from more exotic interpretations.
Comments10 pages, 5 figures
