Observation by an air-shower array in Tibet of the multi-TeV cosmic-ray anisotropy due to terrestrial orbital motion around the Sun.
Observation by an air-shower array in Tibet of the multi-TeV cosmic-ray anisotropy due to terrestrial orbital motion around the Sun.
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DOI：
10.1103/physrevlett.93.061101
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发表时间：
2004-08
影响因子：
8.6
通讯作者：
M. Amenomori;S. Ayabe;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Feng;Z. Feng;X. Gao;
中科院分区：
文献类型：
--
作者：
M. Amenomori;S. Ayabe;S. Cui;Danzengluobu;L. Ding;X. Ding;C. Feng;Z. Feng;X. Gao;
We report on the solar diurnal variation of the galactic cosmic-ray intensity observed by the Tibet III air shower array during the period from 1999 to 2003. In the higher-energy event samples (12 and 6.2 TeV), the variations are fairly consistent with the Compton-Getting anisotropy due to the terrestrial orbital motion around the Sun, while the variation in the lower-energy event sample (4.0 TeV) is inconsistent with this anisotropy. This suggests an additional anisotropy superposed at the multi-TeV energies, e.g., the solar modulation effect. This is the highest-precision measurement of the Compton-Getting anisotropy ever made.
