耀变体的高能中微子发射

F. Oikonomou
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引用次数: 6

摘要

具有相对论性喷流的活动星系核(AGN)是宇宙中最强大的持久电磁辐射天体物理源。耀变体是AGN中最极端的一类,它的喷流沿着观察者的视线方向。它们的高能光子发射在河外伽马射线天空中占主导地位,达到多tev能量。这表明耀变体将粒子加速到非常高的能量。长期以来,人们一直怀疑耀变体也可能将质子加速到非常高的能量,从而成为宇宙中微子源。除了明亮之外,耀变体是极其罕见的天体,也是最容易测试的中微子候选源之一。最近,几个多信使监测活动被触发,以响应冰立方中微子天文台从耀变体方向观测到的高能中微子。在这篇文章中,我总结了这些观测的理论解释,并根据实验结果概述了耀变体作为中微子源的可能作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-energy neutrino emission from blazars
Active galactic nuclei (AGN) with relativistic jets are the most powerful persistent astrophysical sources of electromagnetic radiation in the Universe. Blazars are the most extreme subclass of AGN with jets directed along the line of sight of the observer. Their high-energy photon emission dominates the extragalactic gamma-ray sky and reaches multi-TeV energies. This demonstrates that blazars accelerate particles to very high energies. It has long been suspected that blazars may also accelerate protons to very high energies and thus be cosmic neutrino sources. Being extremely rare objects in addition to being bright, blazars are among the most readily testable neutrino candidate source classes. Several multi-messenger monitoring campaigns have recently been triggered in response to high-energy neutrinos observed with the IceCube Neutrino Observatory from the direction of blazars. In this contribution, I summarise the theoretical interpretation of these observations and give an overview of the possible role of blazars as neutrino sources in light of the experimental results.
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