| 日時: |
2010-01-26 11:00 - 12:00 |
| 場所: |
４号館345室 |
| 会議名: |
Toward unveiling the sources of the highest energy cosmic raysToward unveiling the sources of the highest energy cosmic rays |
| 連絡先: |
川中、norita AT post.kek.jp |
| 講演者: |
Dr. Hajime Takami (IPMU) |
| 講演言語: |
英語 |
| アブストラクト: |
The origin of the highest energy cosmic rays (HECRs) is one of the biggest mysteries in modern astrophysics. A main reason why we have not able to identify their sources is magnetic fields in the Universe, i.e., the trajectories of HECRs are deflected by them. Recent progress of very large detectors for HECRs like Pierre Auger Observatory has unveiled their anisotropic arrival distribution and also spatial correlation between the arrival directions of HECRs and matter distribution of local Universe. These facts point out that magnetic fields are not so large that the arrival directions of HECRs lose information on their sources, but, the magnetic fields are not negligible, since we do not find any plausible source candidates to the arrival directions of detected HECRs. Thus, in order to explore the origin of HECRs by HECRs themselves, it is essential to take their propagation in magnetized Universe into account. In this seminar, I will briefly review our current understanding of HECR sources and mainly discuss the possibility to find the sources by cosmic ray astronomy, especially focusing on the propagation of the highest energy protons in intergalactic and Galactic magnetic fields. |
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