Cosmic Ray Processes in Galactic Ecosystems

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS Galaxies Pub Date : 2023-06-16 DOI:10.3390/galaxies11040086
E. Owen, Kinwah Wu, Y. Inoue, H. Yang, A. Mitchell
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引用次数: 2

Abstract

Galaxy evolution is an important topic, and our physical understanding must be complete to establish a correct picture. This includes a thorough treatment of feedback. The effects of thermal–mechanical and radiative feedback have been widely considered; however, cosmic rays (CRs) are also powerful energy carriers in galactic ecosystems. Resolving the capability of CRs to operate as a feedback agent is therefore essential to advance our understanding of the processes regulating galaxies. The effects of CRs are yet to be fully understood, and their complex multi-channel feedback mechanisms operating across the hierarchy of galaxy structures pose a significant technical challenge. This review examines the role of CRs in galaxies, from the scale of molecular clouds to the circumgalactic medium. An overview of their interaction processes, their implications for galaxy evolution, and their observable signatures is provided and their capability to modify the thermal and hydrodynamic configuration of galactic ecosystems is discussed. We present recent advancements in our understanding of CR processes and interpretation of their signatures, and highlight where technical challenges and unresolved questions persist. We discuss how these may be addressed with upcoming opportunities.
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银河生态系统中的宇宙射线过程
星系演化是一个重要的话题,我们的物理理解必须是完整的,才能建立一个正确的图景。这包括对反馈的彻底处理。热-机械和辐射反馈的影响已被广泛考虑;然而,宇宙射线(CRs)也是银河系生态系统中强大的能量载体。因此,解决CRs作为反馈代理运行的能力对于提高我们对星系调节过程的理解至关重要。CRs的影响还没有被完全理解,它们复杂的多通道反馈机制在星系结构的层次上运作,构成了一个重大的技术挑战。本文综述了cr在星系中的作用,从分子云的尺度到环星系介质。概述了它们的相互作用过程,它们对星系演化的影响,以及它们的可观测特征,并讨论了它们改变星系生态系统的热和水动力配置的能力。我们介绍了我们对CR流程的理解和对其特征的解释的最新进展,并强调了技术挑战和未解决的问题。我们将讨论如何利用即将到来的机会来解决这些问题。
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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