论文标题
集群无线电的分析模型
Analytical model for cluster radio relics
论文作者
论文摘要
无线电文物是众多的同步源，它们位于合并星系集群的郊区。在这项工作中，我们使用新闻技术形式主义模拟它们的形成，以模拟合并介质的合并率，分析模型和冲击动力学，以及合并冲击中宇宙射线电子的简单模型。我们表明，无线电遗物人群的统计特性在很大程度上取决于关键的物理参数，例如加速度效率，遗物的磁场强度，遗物的几何形状和合并冲击时电子加速度的持续时间。事实证明，通量分布以及功率质量关系可以约束簇内介质的关键参数。随着新的大区域广播调查的出现，无线电文物的统计分析将补充我们从对单个对象的观察中学到的知识。
Radio relics are vast synchrotron sources that sit on the outskirts of merging galaxy clusters. In this work we model their formation using a Press-Schechter formalism to simulate merger rates, analytical models for the intracluster medium and the shock dynamics, as well as a simple model for the cosmic-ray electrons at the merger shocks. We show that the statistical properties of the population of radio relics are strongly dependent on key physical parameters, such as the acceleration efficiency, the magnetic field strength at the relic, the geometry of the relic and the duration of the electron acceleration at merger shocks. It turns out that the flux distribution as well as the power-mass relation can constrain key parameters of the intracluster medium. With the advent of new large-area radio surveys, statistical analyses of radio relics will complement what we have learned from observations of individual objects.
