ON TEMPORAL VARIATIONS OF THE MULTI-TeV COSMIC RAY ANISOTROPY USING THE TIBET III AIR SHOWER ARRAY
ON TEMPORAL VARIATIONS OF THE MULTI-TeV COSMIC RAY ANISOTROPY USING THE TIBET III AIR SHOWER ARRAY
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DOI：
10.1088/0004-637x/711/1/119
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发表时间：
2010-03-01
影响因子：
4.9
通讯作者：
Zhou, X. X.
中科院分区：
文献类型：
--
作者：
Amenomori, M.;Bi, X. J.;Zhou, X. X.
利用1999年11月至2008年12月的西藏大气簇射阵列观测资料，分析了多TeV宇宙线的大尺度二维恒星各向异性。为了探索各向异性的时间变化，数据集被分为九个间隔，每个间隔的时间跨度约为一年。恒星各向异性的星等，约0.1%，似乎相当稳定，从一年到一年，在整个观测期间的9年。这表明TeV银河系CRs的各向异性对太阳活动仍然不敏感，因为观测期间覆盖了第23太阳周的一半以上。
We analyze the large-scale two-dimensional sidereal anisotropy of multi-TeV cosmic rays (CRs) by the Tibet Air Shower Array, with the data taken from 1999 November to 2008 December. To explore temporal variations of the anisotropy, the data set is divided into nine intervals, each with a time span of about one year. The sidereal anisotropy of magnitude, about 0.1%, appears fairly stable from year to year over the entire observation period of nine years. This indicates that the anisotropy of TeV Galactic CRs remains insensitive to solar activities since the observation period covers more than half of the 23rd solar cycle.