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arXiv 2103.16577astro-ph.HEhep-ph
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天体物理源中光强中微子产生的统一热模型

Unified thermal model for photohadronic neutrino production in astrophysical sources

Damiano F. G. Fiorillo, Arjen Van Vliet, Stefano Morisi, Walter Winter

摘要:

高能天体物理中微子通量,在许多应用中,模拟为简单的幂律作为能量的函数。虽然这在强子$pp$源产生中微子的情况下是合理的,但它通常不能捕获光强子$pγ$源的行为:在这种情况下,中微子光谱取决于宇宙射线碰撞的目标光子的性质,以及磁场对次级π介子和μ介子的可能影响。我们表明,中微子生产从已知的光强子源可以复制的热(黑体)目标光子光谱,如果适当地调整温度,由于多π生产过程。这允许讨论中微子生产从大多数已知的$pγ$来源,如伽马射线暴,活动星系核和潮汐破裂事件,在一些参数。我们应用这个热模型来研究不同类别的中微子望远镜的光强源的灵敏度:我们分类的模型参数空间,根据实验是最适合于检测一个特定的源类,并证明不同的实验类,如密集阵列,传统的中微子望远镜,或无线电探测实验,覆盖不同的部分参数空间。由于该模型也可以再现的味道和中微子-反中微子组成,我们研究的影响的轨道簇射比和的marthow共振。

英文摘要:

High-energy astrophysical neutrino fluxes are, for many applications, modeled as simple power laws as a function of energy. While this is reasonable in the case of neutrino production in hadronuclear $pp$ sources, it typically does not capture the behavior in photohadronic $pγ$ sources: in that case, the neutrino spectrum depends on the properties of the target photons the cosmic rays collide with and on possible magnetic-field effects on the secondary pions and muons. We show that the neutrino production from known photohadronic sources can be reproduced by a thermal (black-body) target-photon spectrum if one suitably adjusts the temperature, thanks to multi-pion production processes. This allows discussing neutrino production from most known $pγ$ sources, such as gamma-ray bursts, active galactic nuclei and tidal disruption events, in terms of a few parameters. We apply this thermal model to study the sensitivity of different classes of neutrino telescopes to photohadronic sources: we classify the model parameter space according to which experiment is most suitable for detection of a specific source class and demonstrate that different experiment classes, such as dense arrays, conventional neutrino telescopes, or radio-detection experiments, cover different parts of the parameter space. Since the model can also reproduce the flavor and neutrino-antineutrino composition, we study the impact on the track-to-shower ratio and the Glashow resonance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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