2013 Fiscal Year Final Research Report
Unveiling Emission Mechanism of Gamma-Ray Bursts from the Central Engine
| Project/Area Number |
23340069
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Institute of Physical and Chemical Research (2013)
Kyoto University (2011-2012) |
|---|
Principal Investigator |
NAGATAKI Shigehiro 独立行政法人理化学研究所, 長瀧天体ビッグバン研究室, 准主任研究員 (60359643)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KOTAKE Kei 福岡大学, 理学部, 准教授 (20435506)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
ITO Hirotaka 独立行政法人理化学研究所, 長瀧天体ビッグバン研究室, 特別研究員 (30434278)
|
|---|
| Project Period (FY) |
2011-04-01 – 2014-03-31
|
| Keywords | ガンマ線バースト / ガンマ線放射輸送 / 磁気流体 / ニュートリノ / 一般相対論 / ブラックホール / マグネター / 宇宙定数 |
|---|
| Research Abstract |
For this project, we have developed our General Relativistic MHD code and applied it for numerical simulations of formation of Gamma-Ray Burst (GRB) jets. We found that more rapidly rotating black holes can drive stronger GRB jets. Up to now, only two groups in the world have succeeded to perform such simulations. We also did numerical simulations on propagation of relativistic GRB-Jets. We succeeded to explain the phenominological relation between Luminosity and Energy of Gamma-rays in GRBs by estimating the photospheric emission from the photosphere of GRB jets. Further, we did Monte-Carlo simulations for propagation of gamma-rays in GRB-jets. We succeeded to explain the typical spectrum of GRBs as well as large polarization that was observed recently by a Japanese satellite, IKAROS.
|
