arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.07673astro-ph.CO
收藏

星系团和星系群的标度关系及其演化

Scaling relations of clusters and groups, and their evolution

Lorenzo Lovisari, Ben J. Maughan

AI总结:

本章探讨星系团和星系群ICM的X射线标度关系,介绍自相似模型预期,并分析气体冷却与非引力加热导致的偏离及测量解释中的复杂因素。

摘要:

对星系群和星系团中高温星系团内介质(ICM)的X射线观测提供了诸如气体质量、X射线光度和温度等物理量。分析这些可观测性质之间的标度关系,为了解ICM中发生的物理过程提供了重要见解。此外,理解ICM性质与星系团总质量之间的标度关系,对于利用星系团进行宇宙学研究至关重要。基于这些原因,星系群和星系团的X射线标度关系在过去几十年中一直是研究的重点。在本章中,我们首先介绍了基于仅引力驱动ICM演化假设的自相似模型的预期结果,随后讨论了气体冷却和非引力加热过程如何被认为导致了观测上对自相似场景的偏离。我们还描述了在测量和解释标度关系时必须考虑的重要复杂因素。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑