论文标题
簇和群体的扩展关系及其演变
Scaling relations of clusters and groups, and their evolution
论文作者
论文摘要
星系组和簇中热集群内培养基（ICM）的X射线观察提供了数量，例如其气体质量，X射线光度和温度。对这些可观察到的属性之间的缩放关系的分析使对ICM中发生的物理过程的洞察力有相当大的见解。此外，对ICM性质与总簇质量之间的缩放关系的理解对于与簇的宇宙学研究至关重要。由于这些原因，在过去的几十年中，群体和集群的X射线缩放关系一直是研究的重点。在本章中，在介绍了自相似模型的期望之后，基于仅重力驱动ICM演变的假设，我们讨论了气体冷却和非重力加热的过程如何构成观察到的自相似情况的偏差。我们还描述了在测量和解释缩放关系时必须考虑的重要并发症。
X-ray observations of the hot intra-cluster medium (ICM) in galaxy groups and clusters provide quantities such as their gas mass, X-ray luminosity, and temperature. The analysis of the scaling relations between these observable properties gives considerable insight into the physical processes taking place in the ICM. Furthermore, an understanding of the scaling relations between ICM properties and the total cluster mass is essential for cosmological studies with clusters. For these reasons, the X-ray scaling relations of groups and clusters have been a major focus of research over the past several decades. In this Chapter, after presenting the expectations from the self-similar model, based on the assumption that only gravity drives the evolution of the ICM, we discuss how the processes of gas cooling and non-gravitational heating are believed to be responsible for the observed deviations from the self-similar scenario. We also describe important complications that must be considered when measuring and interpreting the scaling relations.
