Collaborative Research: Macroscopic and Microscopic Processes in Relativistic Jets

这是对与活动星系核(AGN)和伽马射线暴(GRB)相关的相对论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，并与观测结果进行比较。喷流动力学的宏观研究将涉及喷流是否以及在哪里是磁力或运动学主导的，这涉及估计喷流和介质的声音、阿尔芬和流动速度、加热和冷却速度以及粘度。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喷流中激波的所需特性，研究粒子加速、磁场产生以及活动星系核和伽玛暴的高频发射。这项研究将使用相对论电磁粒子程序，增强计算相对论激波的发射。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，并将发展具有广泛适用性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研究员，由其他资金支持，并需要大学和研究设施科学家之间的重大互动。

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.