Collaborative Research: Macroscopic and Microscopic Processes in Relativistic Jets

这是一项与活动星系核（AGN）和伽马射线暴（GRBs）相关的相对论性喷流的动力学和发射结构的研究。研究包括理论和数值模拟，并将与观测结果进行比较。射流动力学的宏观研究将解决射流是否以及在哪里受到磁力或动力学的支配，这涉及到对射流和介质的声音、阿尔芬和流动速度、加热和冷却速率以及粘度的估计。本研究将使用相对论磁流体力学理论和模拟。微观过程研究将确定射流中冲击所需的特性，研究粒子加速、磁场产生以及AGN和grb的高频发射。这项研究将使用一种相对论性电磁粒子编码，增强计算相对论性激波的发射。这项研究将提供对各种微观等离子体过程的基本物理理解，并将发展广泛适用的微扰理论和数值模拟方法。这项工作涉及一名学生和一名博士后，由其他基金资助，需要大学和研究机构科学家之间的重要互动。

AST-0506719NishikawaThis is a study of the dynamics and emission structures in the relativistic jets associated with active galactic nuclei (AGN) and gamma ray bursts (GRBs). The research includes both theory and numerical simulations, which will be compared with observations. The macroscopic study of jet dynamics will address whether and where jets are magnetically or kinetically dominated, which involves estimating the sound, Alfven and flow speeds, heating and cooling rates, and viscosity, for both the jet and the medium. This research will use relativistic magneto-hydrodynamic theory and simulations. The microscopic process study will determine the required properties of shocks in jets, studying particle acceleration, magnetic field generation, and high frequency emission from AGN and GRBs. This research will use a relativistic electromagnetic particle code, enhanced to compute emission from a relativistic shock.This research will provide a fundamental physical understanding of various microscopic plasma processes, and will develop perturbation theory and numerical simulation methods of broad applicability. The work involves a student and a post-doctoral fellow supported by other funds, and requires significant interaction between university and research facility scientists.