来自银河系的高能中微子发射
High-energy neutrino emission from the Milky Way
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中文总结 AI 辅助
研究银河系中强大引擎位置及宇宙射线传播产生高能中微子的问题,结合中微子味事件形态特征及冰模型等改进,分析冰立方数据,确定银道面高能中微子发射,发现银河系内部是突出中微子源,开启多信使天文学新时代。
中文摘要 AI 辅助
银河系中有天体可将宇宙射线加速到地球上粒子加速器无法企及的能量。找到这些强大银河系引擎的位置并理解宇宙射线如何在银河系中传播从而产生高能中微子,一直是长期目标。本文结合三种中微子味的事件形态特征,将冰模型、校准和重建方面的最新改进应用于12年的冰立方数据。通过预定义的全局分析,以5.7σ的显著性确定了来自银道面的高能中微子发射。进一步研究表明银河系内部区域是一个突出的中微子源,有217个可见能量高于5 TeV的簇射事件,而预期背景为154.4±4.1。这些结果开启了银河系多信使天文学的新时代,为研究宇宙射线传播和探测千秒差距距离上的中微子性质创造了新机会。
英文摘要
The Milky Way hosts astrophysical objects that accelerate cosmic rays to energies beyond the reach of terrestrial particle accelerators. It remains a longstanding goal to locate the sites of these powerful Galactic engines and understand how cosmic rays propagate through the Galaxy, leading to the production of high-energy neutrinos. In this paper, we combine event morphologies characteristic of all three neutrino flavours and apply recent improvements in ice modelling, calibration and reconstruction to 12 years of IceCube data. With a predefined, global analysis we establish high-energy neutrino emission from the Galactic plane at 5.7 $σ$ significance. A further study shows that the inner region of the Galaxy is a prominent neutrino source, with 217 shower events with visible energy above 5 TeV compared with an expected background of 154.4 $\pm$ 4.1. These results herald a new era of Galactic multi-messenger astronomy, creating new opportunities to study cosmic-ray propagation and probe neutrino properties over kiloparsec distances.