Multi-Epoch and Multi-Color Modeling of Gamma-Ray Burst Sources

伽马射线爆发源的多历元和多颜色建模

• 批准号: 0708213
• 负责人: Mikhail Medvedev
• 金额: $ 41.04万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0708213&HistoricalAwards=false
• 关键词: Multi; Epoch; Color; Modeling; Gamma

AST-0708213MedvedevThis project will model the emission from Gamma-Ray Burst (GRB) sources at various epochs and in different energy bands. It makes a strong effort to develop analytical, semi-analytical and numerical frameworks. The work has three main thrusts: 1) to develop a comprehensive model of GRB afterglows by calculating characteristic break frequencies, flux power-law indices and the bolometric flux evolution in the jitter emission paradigm; 2) to understand the non-Fermi acceleration of electrons in collisionless GRB shocks; and 3) to develop a semi-analytical and numerical framework for studies of GRB transient emission, covering the prompt and X-ray flare phases. Accurate modeling of temporal, spectral and polarization evolution will explore whether the models are consistent with the observed correlations. The results will be valuable for improved physical understanding and interpretation of observational results, and ultimately for uncovering the mystery of the origin of GRBs.Graduate student training, education and research is the dominant component of this study, which will support three students for three inter-related sub-projects. During the study, the team will develop a display at their department, along with appropriate web resources, to describe the GRB phenomenon in a non-traditional way using every-day physics. Additional impacts will come from the development of theoretical tools that will influence many areas of plasma astrophysics.

该项目将模拟伽马射线暴（GRB）源在不同时期和不同能量带的发射。它大力发展解析、半解析和数值框架。研究工作主要有三个方面：1)通过计算特征断裂频率、通量幂律指数和抖动发射范式下的热通量演化，建立GRB余辉的综合模型；2)了解无碰撞GRB激波中电子的非费米加速度；3)建立GRB瞬态发射研究的半解析和数值框架，涵盖瞬态和x射线耀斑阶段。对时间、光谱和极化演变的精确模拟将探讨这些模型是否与观测到的相关性相一致。这些结果将有助于提高对观测结果的物理理解和解释，并最终揭开grb起源的神秘面纱。研究生的培养、教育和研究是本研究的主要组成部分，将支持三名学生进行三个相互关联的子项目。在研究期间，该团队将在他们的部门开发一个展示，以及适当的网络资源，以非传统的方式使用日常物理来描述GRB现象。其他影响将来自理论工具的发展，这些工具将影响等离子体天体物理学的许多领域。