OBSERVATION OF SMALL-SCALE ANISOTROPY IN THE ARRIVAL DIRECTION DISTRIBUTION OF TeV COSMIC RAYS WITH HAWC
OBSERVATION OF SMALL-SCALE ANISOTROPY IN THE ARRIVAL DIRECTION DISTRIBUTION OF TeV COSMIC RAYS WITH HAWC
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DOI：
10.1088/0004-637x/796/2/108
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发表时间：
2014-12-01
影响因子：
4.9
通讯作者：
Zhou, H.
中科院分区：
文献类型：
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作者：
Abeysekara, A. U.;Alfaro, R.;Zhou, H.
高海拔水切伦科夫（HAWC）天文台对伽马射线和TeV能量的带电宇宙射线敏感。该探测器仍在建造中，但部分部署的探测器的数据采集已于2013年开始。基于2013年6月至2014年2月期间记录的4.9 x 10（10）事件对宇宙射线到达方向分布的分析显示，在10（-4）水平上，在约10度的角尺度上存在各向异性。HAWC宇宙线天空图显示了三个宇宙线通量显著增强的区域;其中两个区域是由米拉格罗实验首次报道的。第三个区域与ARGO-YBJ实验最近报告的过量相吻合。天空的角功率谱分析表明，所有的条款，直到l = 15显着贡献的过剩。
The High-Altitude Water Cherenkov ( HAWC) Observatory is sensitive to gamma rays and charged cosmic rays at TeV energies. The detector is still under construction, but data acquisition with the partially deployed detector started in 2013. An analysis of the cosmic- ray arrival direction distribution based on 4.9 x 10(10) events recorded between 2013 June and 2014 February shows anisotropy at the 10(-4) level on angular scales of about 10 degrees.. The HAWC cosmic- ray sky map exhibits three regions of significantly enhanced cosmic- ray flux; two of these regions were first reported by the Milagro experiment. A third region coincides with an excess recently reported by the ARGO-YBJ experiment. An angular power spectrum analysis of the sky shows that all terms up to l = 15 contribute significantly to the excesses.