标题： 通过 IceCube 搜索具有介子尖峰特征的银河系 4FGL 源中的中微子 显示英文标题

标题： Search for Neutrinos from the Galactic 4FGL Sources with the Pion-bump Signature with IceCube

摘要： 冰立方中微子观测站位于南极点，覆盖了立方千米的南极冰层，旨在探测TeV-PeV能量范围内的天体物理中微子。 尽管冰立方最近识别出起源于银河平面的弥漫中微子通量，但银河系内的天体物理中微子具体来源仍然难以捉摸。 通过中性π介子衰变产生的强子伽马射线，在约200 MeV处预期会显示出特征性的“π介子峰”或“光谱断裂”。 费米-LAT合作组最近的研究强调了4FGL星表中的56个源，在MeV能量范围内表现出光谱断裂。 从这些源中探测到天体物理中微子将为它们附近的宇宙射线加速提供有力证据。 在本分析中，我们使用13年的冰立方数据，搜索显示π介子峰特征的56个源的天体物理中微子辐射。 我们的发现可能有助于增强对银河系内潜在宇宙射线加速区域的理解。 显示英文摘要

摘要： The IceCube Neutrino Observatory, located at the South Pole, covers a cubic kilometer of Antarctic ice, and is designed to detect astrophysical neutrinos in the TeV-PeV energy range. While IceCube has recently identified a diffuse flux of neutrinos originating from the Galactic Plane, specific sources of astrophysical neutrinos within the Milky Way remain elusive. Hadronic gamma-rays, produced through the decay of neutral pions, are expected to display a characteristic "pion bump" or "spectral break" around 200 MeV. Recent studies by the Fermi-LAT Collaboration highlight 56 sources from the 4FGL Catalog exhibiting a spectral break in the MeV energy range. Detecting astrophysical neutrinos from these sources would provide compelling evidence for cosmic-ray acceleration in their vicinity. In this analysis, we search for astrophysical neutrino emission from 56 sources showing characteristics of a pion bump using 13 years of IceCube data. Our findings could enhance our understanding of potential cosmic-ray acceleration sites in the galaxy.