2011 Fiscal Year Final Research Report
Study of cosmic-ray energy and spatial distribution by observing Galactic diffuse gamma-ray emission
| Project/Area Number |
21340062
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
KATAGIRI Hideaki 茨城大学, 大学院・理学研究科, 准教授 (50402764)
FUKAZAWA Yasushi 広島大学, 大学院・理学研究科, 教授 (60272457)
KAMAE Tsuneyoshi 東京大学, 大学院・理学研究科, 教授 (90011618)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 宇宙線 / ガンマ線天文学 / 星間物質 |
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| Research Abstract |
In order to investigate the energy and spatial distribution of Galactic cosmic-rays(CRs), we extensively analyzed Galactic diffuse gamma-ray emission. The outcome can be summarized by the following three discoveries :[ 1] The energy spectrum of Galactic CRs are close to those directly measured at the Earth[ 2] On the other hand, the CR density differ by~ 20% in a few 100 pc scale in the vicinity of the solar system[ 3] and the CR density distribution in the outer Galaxy is flatter than expectations based on a conventional model.
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Research Products
(36 results)
