Search for the Galactic Disk and Halo Components in the Arrival Directions of High-Energy Astrophysical Neutrinos

被引：21
|
作者：
Troitsky, S. V. [1 ]
机构：
[1] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
来源：
JETP LETTERS | 2015年 / 102卷 / 12期
基金：
俄罗斯科学基金会;
关键词：
EMISSION; MILKY;
D O I：
10.1134/S0021364015240133
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The arrival directions of 40 neutrino events with energies a parts per thousand(3)100 TeV, observed by the IceCube experiment, are studied. Their distribution in the Galactic latitude and in the angular distance to the Galactic Center allow searching for the Milky-Way disk and halo-related components, respectively. No statistically significant evidence for the disk component is found, though even 100% disk origin of the flux is allowed at the 90% confidence level. Contrary, the Galactic Center-Anticenter dipole anisotropy, specific for dark-matter decays (annihilation) or for interactions of cosmic rays with the extended halo of the circumgalactic gas, is clearly favored over the isotropic distribution (the probability of fluctuation of the isotropic signal is similar to 2%).
引用
收藏
页码：785 / 788
页数：4
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