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Plasma Physics of the Intracluster Medium

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Handbook of X-ray and Gamma-ray Astrophysics

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Abstract

This chapter provides a brief tutorial on some aspects of plasma physics that are fundamental to understanding the dynamics and energetics of the intracluster medium (ICM). The tutorial is split into two parts: one that focuses on the thermal plasma component – its stability, viscosity, conductivity, and ability to amplify magnetic fields to dynamical strengths via turbulence and other plasma processes; and one that focuses on the non-thermal population of charged particles known as cosmic rays – their acceleration, re-acceleration, and transport throughout the cluster volume. Observational context is woven throughout the narrative, from constraints on the strength and geometry of intracluster magnetic fields and the effective viscosity of the ICM, to examples of radio halos, radio relics, and cluster shocks that can test theories of particle acceleration. The promise of future X-ray missions to probe intracluster turbulence and discover the impact of small-scale plasma physics, coupled with sensitive, high-resolution radio observations of synchrotron-emitting plasma that reveal the properties of intracluster magnetic fields and particle-acceleration mechanisms, are likely to establish galaxy clusters as the premier cosmic laboratories for deciphering the fundamental physics of hot, dilute plasmas.

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Authors and Affiliations

  1. Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA

    Matthew W. Kunz

  2. School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, USA

    Thomas W. Jones

  3. Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL, USA

    Irina Zhuravleva

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  1. Matthew W. Kunz
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  2. Thomas W. Jones
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  3. Irina Zhuravleva
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Correspondence to Matthew W. Kunz .

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  1. Department of Physics, Fudan University, Shanghai, China

    Cosimo Bambi

  2. Institute for Astronomy and Astrophysics, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany

    Andrea Santangelo

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Kunz, M.W., Jones, T.W., Zhuravleva, I. (2024). Plasma Physics of the Intracluster Medium. In: Bambi, C., Santangelo, A. (eds) Handbook of X-ray and Gamma-ray Astrophysics. Springer, Singapore. https://doi.org/10.1007/978-981-19-6960-7_125

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