Unveiling Emission Mechanism of Gamma-Ray Bursts from the Central Engine

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287056
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Nagataki Shigehiro 国立研究開発法人理化学研究所, 長瀧天体ビッグバン研究室, 准主任研究員 (60359643)
• Co-Investigator(Kenkyū-buntansha): 水田 晃 国立研究開発法人理化学研究所, 戎崎計算宇宙物理研究室, 研究員 (90402817)
• Co-Investigator(Renkei-kenkyūsha): ITO Hirotaka 国立研究開発法人理化学研究所, 長瀧天体ビッグバン研究室, 特別研究員 (30434278) ; MATSUMOTO Jin 国立研究開発法人理化学研究所, 長瀧天体ビッグバン研究室, 基礎科学特別研究員 (70722247)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ガンマ線バースト / ブラックホール / 輻射輸送 / 超新星 / 相対論的ジェット / ニュートリノ / 状態方程式 / アインシュタイン方程式

Outline of Final Research Achievements

We have developed a 3-dimensional relativistic magneto-hydro code. Using the code, we have performed simulations of a relativistic jet that is penetrating through its progenitor star. Using the results, we calculated radiation transfer in gamma-ray band. Using our results, we discussed the observed polarization by IKAROS sattellite (Japanese one). Also, we reproduced the observed spectrum of gamma-ray bursts. In fiscal year 2017, we are going to release our very important result which is explaining observations of gamma-ray bursts very well. Due to our results, we believe that we have obtained the evidence that the photospheric emission mechanism is the one for prompt emission of gamma-ray bursts.

Free Research Field

宇宙物理学