Measurement of anisotropy of ultra-high energy cosmic rays by the Telescope Array

被引：1
|
作者：
Tinyakov, P. [1 ,2 ]
Tkachev, I. [2 ]
Okuda, T. [3 ]
机构：
[1] Univ Libre Bruxelles, CP225 Blv Triomphe, B-1050 Brussels, Belgium
[2] Inst Nucl Res, Moscow 117312, Russia
[3] Osaka City Univ, Osaka, Japan
来源：
INTERNATIONAL SYMPOSIUM ON THE RECENT PROGRESS OF ULTRA-HIGH ENERGY COSMIC RAY OBSERVATION | 2011年 / 1367卷
基金：
美国国家科学基金会;
关键词：
Telescope Array; cosmic ray anisotropy; large-scale structure; ARRIVAL DIRECTIONS; SCALE ANISOTROPY; SEARCH;
D O I：
10.1063/1.3628723
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study anisotropy of ultra-high energy cosmic ray (UHECR) events collected by the Telescope Array detector in the first 2 years of operation. We find that the self-correlation function of UHECR at energies larger 10 and 40 EeV shows no significant small-scale clustering. The events with energy E > 57 EeV do not significantly correlate with the positions of the nearby active galactic nuclei (AGN): of observed 15 events 6 are found within 3.7 degrees from an AGN, while 3.6 are expected for a random distribution (16% chance probability). We also check the event sets with energies E > 40 EeV and E > 57 EeV for correlations with the large scale structure (LSS) of the Universe. We find that both data sets are compatible with the LSS model at the 95% confidence level.
引用
收藏
页码：100 / 105
页数：6
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