Chin. Phys. Lett.  2017, Vol. 34 Issue (12): 129601    DOI: 10.1088/0256-307X/34/12/129601
GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
Simulation of the Galactic Cosmic Ray Shadow of the Sun
Mohsin Saeed1,2,3, Min Zha1,2**, Zhen Cao1
1Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
2University of Chinese Academy of Sciences, Beijing 100049
3State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100049
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Mohsin Saeed, Min Zha, Zhen Cao 2017 Chin. Phys. Lett. 34 129601
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Abstract The cosmic-ray particles of TeV-regime, outside the solar system are blocked in their way to the Earth, a deficit of particles is observed corresponding to the location of the Sun known as the Sun shadow. The center of the Sun shadow is shifted from its nominal position due to the presence of magnetic fields in interplanetary space, and this shift is used indirectly as a probe to study the solar magnetic field that is difficult to measure otherwise. A detailed Monte Carlo simulation of galactic cosmic-ray propagation in the Earth–Sun system is carried out to disentangle the cumulative effects of solar, interplanetary and geomagnetic fields. The shadowing effects and the displacements results of the Sun shadow in different solar activities are reproduced and discussed.
Received: 08 May 2017      Published: 24 November 2017
PACS:  96.50.S- (Cosmic rays)  
  96.50.sh (Interplanetary propagation and effects)  
  96.60.Q- (Solar activity)  
Fund: Supported by the National Natural Science Foundation of China under Grant No 11675187, the Specialized Research Fund for State Key Laboratories, and the CAS-TWAS President Fellowship Programme.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/34/12/129601       OR      https://cpl.iphy.ac.cn/Y2017/V34/I12/129601
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Mohsin Saeed
Min Zha
Zhen Cao
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