| Project/Area Number |
26870615
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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 |
Astronomy
Particle/Nuclear/Cosmic ray/Astro physics
|
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| Research Institution | Kyushu University (2015-2016)
Tokyo University of Science (2014) |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 超新星ニュートリノ / 超新星背景ニュートリノ / ブラックホール / 重力波 |
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| Outline of Final Research Achievements |
Stars with masses more than 10 solar masses undergo the gravitational collapse and the subsequent supernova explosions and/or black-hole formations. Observational properties of the neutrinos emitted from these processes are investigated in this project. Firstly, for a neutrino burst from Galactic supernovae, time variations are evaluated for the event number, energy and angular distributions, and fraction of events with neutron tag. Secondly, for the supernova relic neutrinos, which are the integration of neutrino flux emitted by past supernovae, the flux and spectrum are evaluated taking into account various uncertainties. As a result, it is found that the low-energy spectrum of supernova relic neutrinos is mainly determined by the cosmic star formation rate density and a future experiment in Super-Kamiokande with gadolinium-loaded water is important for the detection of these low-energy neutrinos.
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