Correlation between solar activity and the sun's shadow observed by the tibet air shower array

M. Amenomori, X. J. Bi, D. Chen, W. Y. Chen, S. W. Cui, Danzengluobu, L. K. Ding, X. H. Ding, C. F. Feng, Zhaoyang Feng, Z. Y. Feng, Q. B. Gou, H. W. Guo, Y. Q. Guo, H. H. He, Z. T. He, K. Hibino, N. Hotta, Haibing Hu, H. B. HuJ. Huang, W. J. Li, H. Y. Jia, L. Jiang, F. Kajino, K. Kasahara, Y. Katayose, C. Kato, K. Kawata, Labaciren, G. M. Le, A. F. Li, C. Liu, J. S. Liu, H. Lu, X. R. Meng, K. Mizutani, K. Munakata, H. Nanjo, M. Nishizawa, M. Ohnishi, I. Ohta, Shunsuke Ozawa, X. L. Qian, X. B. Qu, T. Saito, T. Y. Saito, M. Sakata, T. K. Sako, J. Shao, M. Shibata, A. Shiomi, T. Shirai, H. Sugimoto, M. Takita, Y. H. Tan, N. Tateyama, Shoji Torii, H. Tsuchiya, S. Udo, H. Wang, H. R. Wu, L. Xue, Y. Yamamoto, Z. Yang, S. Yasue, A. F. Yuan, T. Yuda, L. M. Zhai, H. M. Zhang, J. L. Zhang, X. Y. Zhang, Y. Zhang, Yi Zhang, Ying Zhang, Zhaxisangzhu, X. X. Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We analyze the solar cycle variation of the Sun's shadow in 10 TeV cosmic ray intensity observed with the Tibet air shower array over an entire period of the Solar Cycle 23 between 1996 and 2008. The amplitude of the variation is as large as one half of the deficit intensity expected when all cosmic rays arriving from the direction of the optical Sun disk are excluded from the observation. The correlations between the deficit intensity in the Sun's shadow and cosmic-ray modulation parameters are overall significant. Among those parameters, we find the highest correlation with the Heliospheric Current Sheet tilt-angle.

Original languageEnglish
Title of host publicationProceedings of the 32nd International Cosmic Ray Conference, ICRC 2011
PublisherInstitute of High Energy Physics
Pages239-242
Number of pages4
Volume11
DOIs
Publication statusPublished - 2011
Event32nd International Cosmic Ray Conference, ICRC 2011 - Beijing
Duration: 2011 Aug 112011 Aug 18

Other

Other32nd International Cosmic Ray Conference, ICRC 2011
CityBeijing
Period11/8/1111/8/18

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Keywords

  • Cosmic rays
  • Solar magnetic field
  • Solar modulation
  • Sun's shadow
  • Tibet

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Amenomori, M., Bi, X. J., Chen, D., Chen, W. Y., Cui, S. W., Danzengluobu, Ding, L. K., Ding, X. H., Feng, C. F., Feng, Z., Feng, Z. Y., Gou, Q. B., Guo, H. W., Guo, Y. Q., He, H. H., He, Z. T., Hibino, K., Hotta, N., Hu, H., ... Zhou, X. X. (2011). Correlation between solar activity and the sun's shadow observed by the tibet air shower array. In Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 (Vol. 11, pp. 239-242). Institute of High Energy Physics. https://doi.org/10.7529/ICRC2011/V02/0352