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arXiv 1409.4552astro-ph.HE
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来自ANTARES的冰块宇宙中微子流的银河分量的约束

Constraints to a Galactic Component of the Ice Cube cosmic neutrino flux from ANTARES

M. Spurio

摘要:

高能起始事件(HESE)样品中宇宙中微子的IceCube证据激发了大量关于其起源的假设,主要是由于对淋浴事件方向的测量精度不高。事实上,大多数HESE都是向下的,这表明可能有银河系的成分。这可能起源于一个单一的点状源,也可能是来自银河系扩展区域的方向性过剩。这些假设进行审查和约束,使用目前可用的上限从ANTARES中微子望远镜。ANTARES探测来自南方天空中的源的$ν_μ$,其有效面积大于为$E_ν<60$ TeV提供的IceCube HESE,并且在1 PeV时小大约2倍。使用$ν_μ$信号能够精确测量入射中微子的方向。IceCube HESE和相应的ANTARES极限允许的银河信号的幂律通量$E^{-Γ}$,与光谱指数$Γ$范围从2.0到2.5,以涵盖大多数天体物理模型的条款进行了研究。

英文摘要:

The IceCube evidence for cosmic neutrinos in the high-energy starting events (HESE) sample has inspired a large number of hypothesis on their origin, mainly due to the poor precision on the measurement of the direction of showering events. The fact that most of HESE are downward going suggests a possible Galactic component. This could be originated either by a single point-like source or to a directional excess from an extended Galactic region. These hypotheses are reviewed and constrained, using the present available upper limits from the ANTARES neutrino telescope. ANTARES detects $ν_μ$ from sources in the Southern sky with an effective area larger than that providing the IceCube HESE for $E_ν<60$ TeV and a factor of about two smaller at 1 PeV. The use of the $ν_μ$ signal enables an accurate measurement of the incoming neutrino direction. The Galactic signal allowed by the IceCube HESE and the corresponding ANTARES limits are studied in terms of a power law flux $E^{-Γ}$, with spectral index $Γ$ ranging from 2.0 to 2.5 to cover most astrophysical models.

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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