| Project/Area Number |
15K17626
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Research Collaborator |
MUNAKATA Kazuoki
NAKAMURA Yoshiaki
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 太陽磁場 / コロナ磁場 / 惑星間空間磁場 / 宇宙線 / 太陽活動 / コロナ質量放出 |
|---|
| Outline of Final Research Achievements |
The Sun blocks cosmic rays from the direction of the Sun and casts a shadow in the cosmic rays, so-called Sun shadow. We observed the Sun shadows with the cosmic-ray detector in Tibet highland, and these shadows were compared with the MC simulations. As a result, we found the influence of the coronal mass ejection (CME) on the Sun shadow. Furthermore, we found an inconsistency between the interplanetary magnetic field strength derived from the Sun shadow and the model expectation. These results will be useful data to probe the magnetic fields between the Sun and the Earth which are difficult to measure directly.
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