Correlation Between Sun Shadows of 10 TeV Cosmic Ray and the Solar Activity
- Received Date: 1997-01-13
Abstract: Using data obtained in the period of June 1990-October 1993, the shadows of the Sun and the Moon have been detected at 5.7σ and 7.1σ levels, respectively, in the lOTeY cosmic ray flux by the Tibet air shower array at an altitude of 4300 m above sea 夏evel. The shadow of the Sun is found to be deflected away from the Sun by 0.62° to the west and 0.22° to the south by the interplanetary magnetic field. The correlation between the shadow of the Sun and the solar activity and its asymmetry are studied in detail. A new qualitative explanation to the shift and yearly variation of the Sun,s shadow is presented.