项目名称: Fermi伽玛射线暴瞬时辐射能谱的研究
项目编号: No.11263006
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 彭朝阳
作者单位: 云南师范大学
项目金额: 50万元
中文摘要: 本项目主要针对伽玛暴瞬时辐射中未解决的三个主要热点问题:伽玛暴中心发动机抛射物的成分、伽玛暴能量耗散地点和伽玛暴辐射机制,系统地处理和分析Fermi卫星观测的宽能段数据,试图解决一些上述问题。主要研究内容包括:(1)证认出伽玛暴各种能谱成分以及研究各种能谱成分包括经验的Band函数可能的物理起源;(2)寻找高能谱行为的一般性质,并研究其跟低能段的谱相关性;(3)根据高能谱行为鉴别哪种辐射机制在高能辐射里可能是占主导性的;(4)估算伽玛暴火球的整体洛伦兹因子及辐射半径,进而限制伽玛暴的辐射区域和火球的整体洛伦兹因子。最后,希望通过该项目实施,同时能为国内外研究者提供数据支持服务。
中文关键词: 伽玛射线暴;辐射机制;热辐射;非热辐射;脉冲
英文摘要: In this project we present a systematic analysis of the spectral data of gamma-ray burst (GRB) detected by the Fermi satellite based on the three unresovled hot issues of prompt GRBs, (1) Ejecta composition of central engine; (2) Energy dissipation site; and (3) Radiation mechanism of GRB. Our studies mainly contain the following issues: (1) identifying the spectral components and investigating their physics origins as well as the possible physics origin of Band function; (2) seeking for the general properties of high energy spectra and exporing the correlations between high and low energy bands; (3) discerning which radiation mechanism is primary acording to the properties of high energy spectra;(4) estimating bulk Lorentz factor and radiation radius to constrain the radiation region and bulk Lorentz factor of fireball.Finally, we are hopeful the project will be afford the domestic and foreign scholars data service.
英文关键词: Gamma-Ray Burst;radiation mechanism;thermal-radiation;non-thermal-radiation;pulse