Updated study on multi-TeV cosmic-ray modulation with the Tibet Ⅲ air shower array using the east-west method
We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet air shower array data taken from November 1999 to December 2008. The statistics are twice the amount used in our previous paper. In this analysis, the amplitude of the observed sidereal tim...
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| Published in | Chinese physics C Vol. 37; no. 3; pp. 53 - 57 |
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| Format | Journal Article |
| Language | English |
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01.03.2013
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| Abstract | We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet air shower array data taken from November 1999 to December 2008. The statistics are twice the amount used in our previous paper. In this analysis, the amplitude of the observed sidereal time modulation is about 0.1%, and the modulation shows an excess from about 4 to 7 hours and a deficit around 12 hours in local sidereal time. The sidereal time modulation has a weak dependence on the primary energy of the cosmic rays. However, the solar time modulation shows a large energy dependence. We find that the solar time modulation is fairly consistent with the prediction of the Compton-Getting effect for high-energy samples （6.2TeV and 12.0TeV）, but exceeds the prediction for the low-energy sample （4.0TeV）. Such a discrepancy may be due to the solar modulation or the characteristics of the experimental device in the near threshold energy. |
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| AbstractList | We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet III air shower array data taken from November 1999 to December 2008. The statistics are twice the amount used in our previous paper. In this analysis, the amplitude of the observed sidereal time modulation is about 0.1%, and the modulation shows an excess from about 4 to 7 hours and a deficit around 12 hours in local sidereal time. The sidereal time modulation has a weak dependence on the primary energy of the cosmic rays. However, the solar time modulation shows a large energy dependence. We find that the solar time modulation is fairly consistent with the prediction of the Compton-Getting effect for high-energy samples (6.2 TeV and 12.0 TeV), but exceeds the prediction for the low-energy sample (4.0 TeV). Such a discrepancy may be due to the solar modulation or the characteristics of the experimental device in the near threshold energy. We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet air shower array data taken from November 1999 to December 2008. The statistics are twice the amount used in our previous paper. In this analysis, the amplitude of the observed sidereal time modulation is about 0.1%, and the modulation shows an excess from about 4 to 7 hours and a deficit around 12 hours in local sidereal time. The sidereal time modulation has a weak dependence on the primary energy of the cosmic rays. However, the solar time modulation shows a large energy dependence. We find that the solar time modulation is fairly consistent with the prediction of the Compton-Getting effect for high-energy samples （6.2TeV and 12.0TeV）, but exceeds the prediction for the low-energy sample （4.0TeV）. Such a discrepancy may be due to the solar modulation or the characteristics of the experimental device in the near threshold energy. |
| Author | 李爱凤 毕效军 陈天禄 陈文益 崔树旺 单增罗布 丁林恺 丁晓红 冯存峰 冯朝阳 冯振勇 苟全补 郭宏伟 郭义庆 何会海 侯正涛 胡海冰 胡红波 黄晶 李万杰 贾焕玉 姜龙 康明铭 乐贵明 雷文华 厉海金 刘成 刘金胜 刘茂元 卢红 孟宪茹 钱祥利 曲晓波 谭有恒 王辉 吴含荣 沈长铨 沈培若 薛良 杨振 袁爱芳 翟留名 张慧敏 张吉龙 张学尧 张勇 张毅 张颖 周勋秀 |
| AuthorAffiliation | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China Tibet University, Lhasa 850000, China Hebei Normal University, Shijiazhuang 050016, China Shandong University, Jinan 250100, China Southwest Jiaotong University, Chengdu 610031, China Shandong Agricultural University, Taian 271018, China |
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| Cites_doi | 10.1103/PhysRev.47.817 10.1016/0032-0633(65)90131-5 10.1086/431582 10.1029/97JA02520 10.1103/PhysRevLett.93.061101 10.1029/98JA01105 10.1103/PhysRevD.56.23 10.1038/322434a0 10.1126/science.1151124 10.1103/PhysRevD.67.042002 10.1126/science.1131702 10.1103/PhysRevD.75.062003 10.1103/PhysRevLett.69.2468 10.1016/j.astropartphys.2006.01.003 |
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| Notes | 11-5641/O4 cosmic-ray anisotropy, Compton-Getting effect, east-west method We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet air shower array data taken from November 1999 to December 2008. The statistics are twice the amount used in our previous paper. In this analysis, the amplitude of the observed sidereal time modulation is about 0.1%, and the modulation shows an excess from about 4 to 7 hours and a deficit around 12 hours in local sidereal time. The sidereal time modulation has a weak dependence on the primary energy of the cosmic rays. However, the solar time modulation shows a large energy dependence. We find that the solar time modulation is fairly consistent with the prediction of the Compton-Getting effect for high-energy samples （6.2TeV and 12.0TeV）, but exceeds the prediction for the low-energy sample （4.0TeV）. Such a discrepancy may be due to the solar modulation or the characteristics of the experimental device in the near threshold energy. LI Ai-Feng BI Xiao-Jun CHEN Tian-Lu CHEN Wen-Yi CUI Shu-Wang DANZENGLUOBU DING Lin-Zai DING Xiao-Hong FENG Cun-Feng FENG Zhao-Yang FENG Zhen-Yong GOU Quan-Bu GUO Hong-Wei GUO Yi-Qing HE Hui-Hai HOW Zheng-Tao HU Hai-Bing HU Hong-Bo HUANG Jing LI Wan-Jie JIA Huan-Yu JIANG Long KANG Ming-Ming LE Gui-Ming LEI Wen-Hua LI Hai-Jin LIU Cheng LIU Jin-Sheng LIU Mao-Yuan LU Hong MENG Xian-Ru QIAN Xiang-Li QU Xiao-Bo TAN You-Heng WANG Hui WU Han-Rong SHEN Chang-Quan SHEN Pei-Ruo XUE Liang YANG Zhen YUAN Ai-Fang ZHAI Liu-Ming ZHANG Hui-Min ZHANG Ji-Long ZHANG Xue-Yao ZHANG Yong ZHANG Yi ZHANG Ying ZHOU Xun-Xiu Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2 Tibet University, Lhasa 850000, China 3 Hebei Normal University, Shijiazhuang 050016, China 4 Shandong University, Jinan 250100, China 5 Southwest Jiaotong University, Chengdu 610031, China 6 Shandong Agricultural University Taian 271018, China ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
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| References | 13 14 15 16 Amenomori M (17) 2005; 626 Munakata K (12) 18 Krymsky G F (9) 1964; 977 1 2 3 4 5 7 Amenomori M (11) 2010; 1302 8 The EAS-TOP Collaboration (6) 2003 10 Amenomori M (19) 2001 |
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| Snippet | We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet air shower array data taken from November 1999... We study the sidereal and solar time modulation of multi-TeV cosmic rays using the east-west method with Tibet III air shower array data taken from November... |
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| SubjectTerms | Air showers Arrays Cosmic rays Modulation Samples Sidereal time Statistical analysis TeV Tibet 太阳能 宇宙射线 恒星时 时间调制 西藏 阵列 风淋 |
| Title | Updated study on multi-TeV cosmic-ray modulation with the Tibet Ⅲ air shower array using the east-west method |
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