Constraints on the origin of the ultra-high energy cosmic-rays using cosmic diffuse neutrino flux limits : An analytical approach
Constraints on the origin of the ultra-high energy cosmic-rays using cosmic diffuse neutrino flux limits : An analytical approach
复制标题
使用宇宙扩散中微子通量限制对超高能宇宙射线起源的约束：一种分析方法
DOI：
10.1103/physrevd.85.063002
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发表时间：
2012
影响因子：
5
通讯作者：
A.Ishihara
中科院分区：
文献类型：
--
作者：
S.Yoshida;A.Ishihara
天体物理中微子预计会在超高能宇宙射线与周围光子的相互作用中产生。天体物理中微子的通量高度依赖于宇宙射线源的特征，例如它们的宇宙学分布。我们使用实验获得的高于 100 PeV 的扩散中微子通量，以独立于模型的方式研究了宇宙射线源特性的可能限制。推导出半解析公式来估计宇宙中微子通量作为源演化参数和红移中源扩展的函数。得到的公式将中微子通量的上限转化为对宇宙线源的约束。研究发现，IceCube最近获得的宇宙中微子上限限制了强烈演化的超高能宇宙线源的场景，而ascale探测器未来的限制能够进一步限制演化与宇宙恒星形成速率相当的超高能宇宙线源。
Astrophysical neutrinos are expected to be produced in the interactions of ultrahigh energy cosmic rays with surrounding photons. The fluxes of the astrophysical neutrinos are highly dependent on the characteristics of the cosmic-ray sources, such as their cosmological distributions. We study possible constraints on the properties of cosmic-ray sources in a model-independent way using experimentally obtained diffuse neutrino flux above 100 PeV. The semianalytic formula is derived to estimate the cosmogenic neutrino fluxes as functions of source evolution parameter and source extension in redshift. The obtained formula converts the upper limits on the neutrino fluxes into the constraints on the cosmic-ray sources. It is found that the recently obtained upper limit on the cosmogenic neutrinos by IceCube constrains the scenarios with strongly evolving ultrahigh energy cosmic-ray sources, and the future limits from ascale detector are able to further constrain the ultrahigh energy cosmic-rays sources with evolutions comparable to the cosmic star formation rate.