标题： 使用IceCube在北半球搜索塞弗特星系的高能中微子辐射 显示英文标题

标题： Searching for High-Energy Neutrino Emission from Seyfert Galaxies in the Northern Sky with IceCube

摘要： 冰立方探测器近期在附近活动星系 NGC 1068 检测到来自 TeV 中微子辐射，这表明活动星系核（AGN）可能对总的高能宇宙中微子通量做出显著贡献。NGC 1068 缺乏 TeV 光子辐射，这表明中微子的产生源自 AGN 的最内层区域。 盘冕模型预测了 Seyfert 星系（AGN 的一个子类，NGC 1068 属于此类）中中微子与 keV X 射线之间的相关性。 利用 IceCube 的 10 年贯穿轨迹事件，我们报告了通过对 27 个额外北方天空源的研究，基于通用单幂律谱假设和盘冕模型预测谱的结果。我们的结果显示，与两个源 NGC 4151 和 CGCG 420-015 相关的中微子存在 2.7$\sigma$显著性的超额，并同时限制了我们源列表中的集体中微子辐射。 显示英文摘要

摘要： The recent detection of TeV neutrino emission from the nearby active galaxy NGC 1068 by IceCube suggests that AGN could make a sizable contribution to the total high-energy cosmic neutrino flux. The absence of TeV gamma rays from NGC 1068, indicates neutrino production originates in the innermost region of the AGN. Disk-corona models predict a correlation between neutrinos and keV X-rays in Seyfert galaxies, a subclass of AGN to which NGC 1068 belongs. Using 10 years of IceCube through-going track events, we report results from searches for neutrino signals from 27 additional sources in the Northern Sky by studying both the generic single power-law spectral assumption and spectra predicted by the disk-corona model. Our results show excesses of neutrinos associated with two sources, NGC 4151 and CGCG 420-015, at 2.7$\sigma$ significance, and at the same time constrain the collective neutrino emission from our source list.