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arXiv 1810.08482astro-ph.HEastro-ph.GA
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TeV以上IceCube中微子的费米-LAT对应体

Fermi-LAT counterparts of IceCube neutrinos above 100 TeV

F. Krauß, K. Deoskar, C. Baxter, M. Kadler, M. Kreter, M. Langejahn, K. Mannheim, P. Polko, B. Wang, J. Wilms

摘要:

冰立方合作组织已经公布了四年的数据,观测到的中微子通量大大超过了预期的大气背景。由于大气背景光谱急剧下降,最高能量的事件最有可能是外星人。在我们以前的方法中,我们研究了耀变体作为高能起始事件(HESE)中微子事件在PeV能量的可能起源。在这项工作中,我们将我们的研究扩展到包括所有HESE中微子(不包括IC 170922 A)或以上的重建能量为100 TeV,但低于1 PeV。我们研究的X射线和$γ$ -射线数据的所有($\sim200$)3LAC耀变体的位置一致的中微子事件高于100 TeV,以确定最大的中微子流量从这些来源。这个更大的样本使我们能够更好地约束观测到的中微子事件和最大中微子事件数量之间的比例因子。我们发现,当我们考虑一个现实的中微子光谱和其他因素,中微子的数量是在很好的协议与检测到的冰立方HESE事件的数量。我们还表明,有没有直接的相关性之间的\Fermi -LAT $γ$ -射线流量和冰立方中微子流量和中微子的预期数量是一致的,与未检测到个别明亮的耀变体。

英文摘要:

The IceCube Collaboration has published four years of data and the observed neutrino flux is significantly in excess of the expected atmospheric background. Due to the steeply falling atmospheric background spectrum, events at the highest energies are most likely extraterrestrial. In our previous approach we have studied blazars as the possible origin of the High-Energy Starting Events (HESE) neutrino events at PeV energies. In this work we extend our study to include all HESE neutrinos (which does not include IC 170922A) at or above a reconstructed energy of 100 TeV, but below 1 PeV. We study the X-ray and $γ$-ray data of all ($\sim200$) 3LAC blazars that are positionally consistent with the neutrino events above 100 TeV to determine the maximum neutrino flux from these sources. This larger sample allows us to better constrain the scaling factor between the observed and maximum number of neutrino events. We find that when we consider a realistic neutrino spectrum and other factors, the number of neutrinos is in good agreement with the detected number of IceCube HESE events. We also show that there is no direct correlation between \Fermi-LAT $γ$-ray flux and the IceCube neutrino flux and that the expected number of neutrinos is consistent with the non-detection of individual bright blazars.

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