2010 Fiscal Year Final Research Report
Towards the Unified Picture of Gamma Ray Bursts
| Project/Area Number |
19540283
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kyoto University |
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Principal Investigator |
NAKAMURA Takashi Kyoto University, 大学院・理学研究科, 教授 (80155837)
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| Project Period (FY) |
2007 – 2010
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| Keywords | ガンマ線バースト / 距離指標 / 統一理論 / 宇宙論 |
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| Research Abstract |
The origin of Gamma Ray Bursts (GRB) is still not known well. To construct the unified picture of GRBs, we need to find the diagram similar to HR diagram concerning the luminosity and the surface temperature of stars in stellar evolution theory. For this purpose we succeeded in following points. (1) We found a method to calibrate Yonetoku relation independent of cosmological models using TypeIa supernovae.(2)We found that the evolution and selection effects of Yonetoku relation are at most two sigma levels. (3) To increase the accuracy of Yonetoku relation, we should add the dependence of the relation to the duration, use only the events with small observational errors and define the physical quantities in the rest frame of GRBs.
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