arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.00437astro-ph.HE
收藏

Fermi-LAT下的高能中微子

High-Energy Neutrinos in Light of Fermi-LAT

Markus Ahlers

摘要:

高能天体物理中微子的产生与强子伽马射线的发射密切相关。我将讨论最近的观测TeV PeV中微子的冰立方切伦科夫望远镜在伽马射线天文学的背景下。由于与宇宙辐射背景的相互作用,河外伽马射线天文学无法直接获得强子伽马射线的相应能量范围。然而,费米大面积望远镜(LAT)观测到的各向同性亚TeV伽马射线背景包含来自电磁级联产生的二次发射的间接信息,并限制了强子发射方案。另一方面,PeV伽马射线的观测将为银河系的辐射提供一个确凿的信号。在一般情况下,交叉相关的中微子发射与(扩展)银河系和河外伽马射线源将作为最敏感的探针,为未来的中微子源的识别。

英文摘要:

The production of high-energy astrophysical neutrinos is tightly linked to the emission of hadronic gamma-rays. I will discuss the recent observation of TeV to PeV neutrinos by the IceCube Cherenkov telescope in the context of gamma-ray astronomy. The corresponding energy range of hadronic gamma-rays is not directly accessible by extragalactic gamma-ray astronomy due to interactions with cosmic radiation backgrounds. Nevertheless, the isotropic sub-TeV gamma-ray background observed by the Fermi Large Area Telescope (LAT) contains indirect information from secondary emission produced in electromagnetic cascades and constrains hadronic emission scenarios. On the other hand, observation of PeV gamma-rays would provide a smoking-gun signal for Galactic emission. In general, the cross-correlation of neutrino emission with (extended) Galactic and extragalactic gamma-ray sources will serve as the most sensitive probe for a future identification of neutrino sources.

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。

↑