论文标题
来自FSRQ的EEV天体中微子？
EeV Astrophysical neutrinos from FSRQs?
论文作者
论文摘要
扁平频谱无线电类星体（FSRQ）是伽马射乐队中最强大的烈酒。尽管他们应该在产生高能量中微子方面是良好的候选者，但是除了可能的PKS B1424-418外，目前尚未获得FSRQ的安全检测。在这项工作中，我们使用标准假设来计算来自FSRQ的高能量中微子的预期通量，用于填充围绕中央超级质量黑洞周围区域的辐射场的性质。结果，我们从Sub-EEV-EEV能量范围内的FSRQ自然可以预期高能中微子，而不是在PEV能量处。这证明了使用当前技术的FSRQ对中微子的非观察是合理的，因为仅观察到了10 epe的中微子。我们发现，对于参数的不可忽略范围，来自FSRQ的累积通量可与预期的宇宙中微子通量相当甚至超过。该结果令人着迷，并突出了将这些点源排放与弥漫性宇宙基础背景相关的重要性。
Flat Spectrum Radio Quasars (FSRQ) are the most powerful blazars in the gamma-ray band. Although they are supposed to be good candidates in producing high energy neutrinos, no secure detection of FSRQs has been obtained up to now, except for a possible case of PKS B1424-418. In this work, we compute the expected flux of high energy neutrinos from FSRQs using standard assumptions for the properties of the radiation fields filling the regions surrounding the central supermassive black hole. We obtain as a result that high energy neutrinos are naturally expected from FSRQs in the sub-EeV-EeV energy range and not at PeV energies. This justifies the non-observation of neutrinos from FSRQs with the present technology, since only neutrinos below 10 PeV have been observed. We found that for a non-negligible range of the parameters the cumulative flux from FSRQs is comparable to or even exceeds the expected cosmogenic neutrino flux. This result is intriguing and highlights the importance to disentangle these point-source emissions from the diffuse cosmogenic background.
