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Influence of Earth-directed Coronal Mass Ejections on the Sun's Shadow Observed by the Tibet-III Air Shower Array

Abstract:

We examine the possible influence of Earth-directed coronal mass ejections (ECMEs) on the Sun's shadow in the 3 TeV cosmic-ray intensity observed by the Tibet-III air shower (AS) array. We confirm a clear solar-cycle variation of the intensity deficit in the Sun's shadow during ten years between 2000 and 2009. This solar-cycle variation is overall reproduced by our Monte Carlo (MC) simulations of the Sun's shadow based on the potential field model of the solar magnetic field averaged over each solar rotation period. We find, however, that the magnitude of the observed intensity deficit in the Sun's shadow is significantly less than that pbkp_redicted by MC simulations, particularly during the period around solar maximum when a significant number of ECMEs is recorded. The χ 2 tests of the agreement between the observations and the MC simulations show that the difference is larger during the periods when the ECMEs occur, and the difference is reduced if the periods of ECMEs are excluded from the analysis. This suggests the first experimental evidence of the ECMEs affecting the Sun's shadow observed in the 3 TeV cosmic-ray intensity.

Año de publicación:

2018

Keywords:

  • Sun: coronal mass ejections (CMEs)
  • Sun: activity
  • Magnetic fields
  • cosmic rays

Fuente:

scopusscopus

Tipo de documento:

Article

Estado:

Acceso restringido

Áreas de conocimiento:

  • Ciencia planetaria
  • Ciencia planetaria

Áreas temáticas:

  • Cuerpos y fenómenos celestes específicos

Contribuidores:

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