Search for extreme SPE for the past 2500 years using cosmogenic nuclides
| Project/Area Number |
26887019
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Nagoya University |
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Principal Investigator |
MIYAKE Fusa 名古屋大学, 高等研究院(宇宙), 特任助教 (90738569)
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| Project Period (FY) |
2014-08-29 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 宇宙線生成核種 / 大規模SPE / 放射性炭素 |
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| Outline of Final Research Achievements |
It is considered that 14C contents in tree rings and 10Be concentrations in ice cores would record the past incoming cosmic ray intensities. The purposes of this study are to specify the origin of the annual cosmic ray increase event in AD 775, and to search for other cosmic ray events.
We showed that the plausible origin of the 775 event is an extreme SPE (or several SPEs) by measuring 10Be concentrations in the Dome Fuji ice core in the Antarctica. Also we showed an extreme annual event comparable to the 775 event is very rare, and found a different type of cosmic ray increase event by 14C measurements for the BC time period.
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Report
(3 results)
Research Products
(20 results)
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[Journal Article] Atmospheric impacts of the strongest known solar particle storm of 775 AD2017
Author(s)
T. Sukhodolov, I. Usoskin, E. Rozanov, E. Asvestari, W.T. Ball1, M.A.J. Curran, H. Fischer, G. Kovaltsov, F. Miyake, T Peter, C. Plummer, W. Schmutz, M Severi & R. Traversi
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Journal Title
Sci. Rep.
Volume: 7
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Search for annual 14C excursion in the past2016
Author(s)
F. Miyake, K. Masuda, T. Nakamura, K. Kimura, M. Hakozaki, A.J.T. Jull, T.E. Lange, R. Cruz, I.P. Panyushkina, C. Baisan & M.W. Salzer
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Journal Title
Radiocarbon
Volume: 印刷中
Issue: 2
Pages: 315-320
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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