Ram pressure stripping in high-density environments
Ram pressure stripping in high-density environments
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DOI：
10.1007/s00159-022-00140-3
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
A. Boselli;M. Fossati;M. Sun
中科院分区：
文献类型：
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作者：
A. Boselli;M. Fossati;M. Sun
生活在丰富环境中的银河系正在遭受不同的扰动，这些扰动能够极大地影响它们的进化。其中，冲压压力剥离（rampressstripping）是星系团引力势阱中热而致密的星系团内介质（ICM）对高速运动星系的压力作用，是去除星系团内星际介质（ISM）、抑制星系团形成星星活动的关键过程。这篇评论的目的是描述这种物理机制在不同的环境中，从丰富的星系团到松散和紧凑的集团。我们总结了这种扰动过程对星系重子成分的影响，从不同的气相（冷原子和分子，电离，热）的磁场和宇宙射线，并描述了它们对不同的恒星种群的诱导效应，特别注意其作用一般在高密度环境中观察到的淬火事件。我们还讨论了从扰动星系中剥离出来的物质与ICM混合后的可能命运，并试图估计它对周围环境的污染。最后，结合局域观测和高红移观测的结果，以及调谐模型和模拟的预测，我们试图量化这一过程对不同质量星系演化的重要性，从矮星系到巨星系，在不同的环境和不同的时代。
Galaxies living in rich environments are suffering different perturbations able to drastically affect their evolution. Among these, ram pressure stripping, i.e. the pressure exerted by the hot and dense intracluster medium (ICM) on galaxies moving at high velocity within the cluster gravitational potential well, is a key process able to remove their interstellar medium (ISM) and quench their activity of star formation. This review is aimed at describing this physical mechanism in different environments, from rich clusters of galaxies to loose and compact groups. We summarise the effects of this perturbing process on the baryonic components of galaxies, from the different gas phases (cold atomic and molecular, ionised, hot) to magnetic fields and cosmic rays, and describe their induced effects on the different stellar populations, with a particular attention to its role in the quenching episode generally observed in high-density environments. We also discuss on the possible fate of the stripped material once removed from the perturbed galaxies and mixed with the ICM, and we try to estimate its contribution to the pollution of the surrounding environment. Finally, combining the results of local and high-redshift observations with the prediction of tuned models and simulations, we try to quantify the importance of this process on the evolution of galaxies of different mass, from dwarfs to giants, in various environments and at different epochs.