2005 Fiscal Year Final Research Report Summary
Radio Observation in High Energy Astrophysics
| Project/Area Number |
14204027
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Waseda University |
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Principal Investigator |
DAISHIDO Tsuneaki Waseda University, School of Education, Department of Science, Professor (10112989)
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| Co-Investigator(Kenkyū-buntansha) |
MAEDA Keiichi School of Science and Engineering, Department of Physics, Professor (70199610)
KOMATSU Shinichi School of Science and Engineering, Department of Aplied Physics, Professor (00087446)
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| Project Period (FY) |
2002 – 2005
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| Keywords | Radio Astronomy / X and Gamma-ray Astronomy / Cosmic Ray / Astrophysics / Relativity and Gravitational Waves / Antennas / Signal Processing |
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| Research Abstract |
In Nasu Observatory, Radio Transient Sources were discovered with spherical dish array at 1.4GHz. These discoveries were investigated in the following Journals. In X and Gamma-ray astronomy as well as in optical astronomy, we have facilities having large field of view to detect transient objects. One example was Gamma-ray Bursts. It took more than 30 years to understand they were cosmological objects. In radio waves, transient sources in Galactic plane were known in early seventies. Typical one was Cyg-X3, in which large outbursts were observed once a year or so. However, no radio transients was known at high Galactic latitudes until Nasu Observatory started observation in 2000. We have developed Large Spherical Dish Array Interferometer at very low cost. We also developed digital signal processing system to search large field of view. As a result, we found several radio transients at high Galactic latitudes.
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