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Both, X-ray and radio observations, are beginning to probe regions in galaxy clusters close to the virial radius. These are particularly interesting regions as they are (i) crucial for the thermal evolution of the intra-cluster medium and…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-18 M. Bruggen , R. J. van Weeren , H. J. A. Rottgering

As the largest virialized structures in the universe, galaxy clusters continue to grow and accrete matter from the cosmic web. Due to the low gas density in the outskirts of clusters, measurements are very challenging, requiring extremely…

The presence of magnetic fields in the intra-cluster medium of galaxy clusters is now well estabilished. It is directly revealed by the presence of cluster-wide radio sources: radio halos and radio relics. In the last years increasing…

Cosmology and Nongalactic Astrophysics · Physics 2010-09-08 A. Bonafede , L. Feretti , M. Murgia , F. Govoni , G. Giovannini , V. Vacca

In recent years, the outskirts of galaxy clusters have emerged as one of the new frontiers and unique laboratories for studying the growth of large scale structure in the universe. Modern cosmological hydrodynamical simulations make firm…

Until recently, only about 10% of the total intracluster gas volume had been studied with high accuracy, leaving a vast region essentially unexplored. This is now changing and a wide area of hot gas physics and chemistry awaits discovery in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Thomas H. Reiprich , Kaustuv Basu , Stefano Ettori , Holger Israel , Lorenzo Lovisari , Silvano Molendi , Etienne Pointecouteau , Mauro Roncarelli

The existence of magnetic fields associated with the intracluster medium in clusters of galaxies is now well established through different methods of analysis. Magnetic fields are investigated in the radio band from studies of the rotation…

Astrophysics · Physics 2009-11-10 Federica Govoni , Luigina Feretti

We review the latest developments in our X-ray observational and theoretical understanding of the outskirts of galaxy clusters, and their connection to the cosmic web. The faint cluster outskirts are challenging regions to observe in…

Cosmology and Nongalactic Astrophysics · Physics 2023-04-05 Stephen Walker , Erwin Lau

With magnetic fields below one microgauss, the minimum pressures of synchrotron plasmas start to approach those in the thermal gas in cluster outskirts and the more diffuse WHIM in large-scale structure filaments. We summarize some of our…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-01 Lawrence Rudnick , Shea Brown , Damon Farnsworth

An important area of study of cosmic magnetic fields is on the largest scales, those of clusters of galaxies. In the last decade it has become clear that the intra-cluster medium (ICM) in clusters of galaxies is magnetized and that magnetic…

Astrophysics · Physics 2009-11-10 L. Feretti , M. Johnston-Hollitt

The recent evidences of the presence of magnetic fields and relativistic particles in galaxy clusters are reviewed. The existence of microG-level magnetic fields in cluster atmospheres appears well established from the detection of diffuse…

Astrophysics · Physics 2017-08-23 Luigina Feretti

Low-frequency radio observations of galaxy clusters are the key to detecting the diffuse extended emission associated with them. The presence and properties of such radio sources in galaxy clusters reveal the existence of magnetic fields on…

Astrophysics · Physics 2009-11-13 R. F. Pizzo , A. G. de Bruyn , L. Feretti , F. Govoni

A brief overview about our knowledge on galaxy cluster magnetic fields is provided. Emphasize is given to the mutual dependence of our knowledge on relativistic particles in galaxy clusters and the magnetic field strength. Furthermore, we…

Astrophysics · Physics 2007-05-23 Torsten A. Ensslin , Corina Vogt , Christoph Pfrommer

The outskirts of galaxy clusters are continuously disturbed by mergers and gas infall along filaments, which in turn induce turbulent flow motions and shock waves. We examine the properties of shocks that form within $r_{200}$ in sample…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-26 Sungwook E. Hong , Dongsu Ryu , Hyesung Kang , Renyue Cen

The existence of magnetic fields associated with the intracluster medium in clusters of galaxies is now well established through different methods of analysis. The most detailed evidence for the presence of cluster magnetic fields comes…

Astrophysics · Physics 2009-11-11 Federica Govoni

The presence of magnetic fields in galaxy clusters has been well established in recent years, and their importance for the understanding of the physical processes at work in the Intra Cluster Medium has been recognized. Halo and relic…

Simulations of structure formation in the Universe predict accretion shock waves at the boundaries of the large-scale structures as sheets, filaments, and clusters of galaxies. If magnetic fields are present at these shocks, particle…

Astrophysics · Physics 2007-05-23 Torsten A. Ensslin , Peter L. Biermann , Ulrich Klein , Sven Kohle

Recent improvements in the capabilities of low frequency radio telescopes provide a unique opportunity to study thermal and non-thermal properties of the cosmic web. We argue that the diffuse, polarized emission from giant radio relics…

Astrophysics · Physics 2011-03-18 N. Battaglia , C. Pfrommer , J. L. Sievers , J. R. Bond , T. A. Ensslin

Magnetic fields in galaxy clusters can be investigated using a variety of techniques. Recent studies including radio halos, Inverse Compton hard X-ray emissions and Faraday rotation measure, are briefly outlined. A numerical approach for…

Astrophysics · Physics 2007-05-23 Federica Govoni , Matteo Murgia

Magnetic fields in galaxy clusters have been measured using a variety of techniques, including: studies of synchrotron relic and halo radio sources within clusters, studies of inverse Compton X-ray emission from clusters, surveys of Faraday…

Astrophysics · Physics 2009-11-07 C. L. Carilli , G. B. Taylor

It has been well established that galaxy clusters have magnetic fields. The exact properties and origin of these magnetic fields are still uncertain even though these fields play a key role in many astrophysical processes. Various attempts…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-21 E. Osinga , R. J. van Weeren , F. Andrade-Santos , L. Rudnick , A. Bonafede , T. Clarke , K. Duncan , S. Giacintucci , Tony Mroczkowski , H. J. A. Röttgering
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