General-Relativistic Plasmas in Cosmological Backgrounds (Physics): ROW Planning Grant

将启动一项研究计划，以研究早期宇宙中的等离子体，当时由于背景扩张而产生的广义相对论效应是显著的。这一时期的等离子体动力学可能会对星系形成理论和星系间磁场的起源产生重要影响，也可能对星系磁场的起源产生重要影响。广义相对论和等离子体物理学的综合在很大程度上是一个未被触及的领域，尤其是宇宙学方面的影响也大多未被探索。在单粒子近似和磁流体力学极限下研究了宇宙等离子体的简单线性理论。将采用基于广义相对论玻尔兹曼方程的动力学方法。此外，还将进行一些非线性分析。然而，要充分研究大多数非线性现象，数值模拟是必要的。因为非线性的集体效应是最有趣的，所以正在开发计算机代码来研究这种效应。这些程序的许多应用正在进行中或计划中，包括但不限于，研究早期宇宙中的等离子体涨落，模拟模式相互作用或阿尔芬波引起的激波形成和加热，以及研究发电机和重联机制对银河系和银河系间磁场起源的影响。

A program of research will be initiated to study plasmas in the early Universe, when general-relativistic effects due to the expansion of the background are significant. Plasma dynamics during this epoch could have important ramifications for the theory of galaxy formation and of the origin of intergalactic, and possibly also galactic, magnetic fields. The synthesis of general relativity and plasma physics is a field that is largely untouched, and the cosmological implications in particular are mostly unexplored. The simple linear theory of cosmological plasmas has been studied in the single-particle approximation and in the magnetohydrodynamic limit. A kinetic approach, based on the general-relativistic Boltzmann equation, will be carried out. In addition, some nonlinear analysis will be performed. However, for most nonlinear phenomena to be studied adequately, numerical simulation is necessary. Because the nonlinear, collective effects are among the most interesting, computer codes are being developed to investigate such effects. Many applications of these codes are underway or planned, including, but not limited to, the study of fluctuations in plasmas in the early Universe, the modeling of shock formation and heating due to mode interactions or to Alfven waves, and the investigation of the effect of dynamo and reconnection mechanisms on the origin of galactic and intergalactic magnetic fields.