2013 Fiscal Year Final Research Report
Extreme Phenomena in the Universe Explored by Highest Energy Cosmic Rays
| Project/Area Number |
21000002
|
|---|
| Research Category |
Grant-in-Aid for Specially Promoted Research
|
| Allocation Type | Single-year Grants |
|---|
| Review Section |
Science and Engineering
Mathematics and Physics
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SAGAWA Hiroyuki 東京大学, 宇宙線研究所, 准教授 (80178590)
KAKIMOTO Fumio 東京工業大学, 理工学研究所, 教授 (00092544)
OGIO Shoichi 大阪市立大学, 理学研究科, 准教授 (20242258)
|
|---|
| Project Period (FY) |
2009 – 2013
|
| Keywords | 宇宙線 / 極高エネルギー / 宇宙物理 / 素粒子物理 / 国際協力 / 宇宙線の起源 |
|---|
| Research Abstract |
Ultra-high energy cosmic rays (UHECRs) have been measured by the Telescope Array (TA) experiment installed in Utah, USA. We collected more than 80,000 samples of air showers with energies between 10^<18> and 10^<20> electron Volts (eV) in 5 years of observation. Analyses of these events indicated that they are consistent as being protons of extra-galactic origin, and their arrival directions become strongly anisotropic above 10^<19.76> eV. In future observations, we aim to pin down the sourcing astronomical object of UHECRs, and to investigate its acceleration mechanism.
|
