Magnetic fields and relativistic electrons fill entire galaxy cluster

A Botteon, RJ van Weeren, G Brunetti, F Vazza… - Science …, 2022 - science.org
The hot plasma within merging galaxy clusters is predicted to be filled with shocks and
turbulence that may convert part of their kinetic energy into relativistic electrons and …

Gentle reenergization of electrons in merging galaxy clusters

F de Gasperin, HT Intema, TW Shimwell, G Brunetti… - Science …, 2017 - science.org
Galaxy clusters are the most massive constituents of the large-scale structure of the
universe. Although the hot thermal gas that pervades galaxy clusters is relatively well …

A radio ridge connecting two galaxy clusters in a filament of the cosmic web

F Govoni, E Orrù, A Bonafede, M Iacobelli, R Paladino… - Science, 2019 - science.org
Galaxy clusters are the most massive gravitationally bound structures in the Universe. They
grow by accreting smaller structures in a merging process that produces shocks and …

How merger-driven gas motions in galaxy clusters can turn AGN bubbles into radio relics

JA ZuHone, M Markevitch, R Weinberger… - The Astrophysical …, 2021 - iopscience.iop.org
Radio relics in galaxy clusters are extended synchrotron sources produced by cosmic-ray
electrons in the microgauss magnetic field. Many relics are found in the cluster periphery …

Revived fossil plasma sources in galaxy clusters

S Mandal, HT Intema, RJ van Weeren… - Astronomy & …, 2020 - aanda.org
It is well established that particle acceleration by shocks and turbulence in the intra-cluster
medium can produce cluster-scale synchrotron emitting sources. However, the detailed …

Particle acceleration on megaparsec scales in a merging galaxy cluster

RJ Van Weeren, HJA Röttgering, M Brüggen, M Hoeft - Science, 2010 - science.org
Galaxy clusters form through a sequence of mergers of smaller galaxy clusters and groups.
Models of diffusive shock acceleration suggest that in shocks that occur during cluster …

The case for electron re-acceleration at galaxy cluster shocks

RJ Van Weeren, F Andrade-Santos, WA Dawson… - Nature …, 2017 - nature.com
On the largest scales, the Universe consists of voids and filaments making up the cosmic
web. Galaxy clusters are located at the knots in this web, at the intersection of filaments …

Particle acceleration in a nearby galaxy cluster pair: the role of cluster dynamics

A Botteon, R Cassano, D Eckert, G Brunetti… - Astronomy & …, 2019 - aanda.org
Context. Diffuse radio emission associated with the intracluster medium (ICM) is observed in
a number of merging galaxy clusters. It is currently believed that a fraction of the kinetic …

Radio halo formation through magnetoturbulent particle acceleration in clusters of galaxies

H Ohno, M Takizawa, S Shibata - The Astrophysical Journal, 2002 - iopscience.iop.org
We develop a magnetoturbulent model for the cosmic-ray (CR) electrons seen in the radio
halo clusters of galaxies. Steady-state momentum distribution functions of the CR electrons …

Radio observations of the merging galaxy cluster Abell 520

DN Hoang, TW Shimwell, RJ Van Weeren… - Astronomy & …, 2019 - aanda.org
Context. Extended synchrotron radio sources are often observed in merging galaxy clusters.
Studies of the extended emission help us to understand the mechanisms in which the radio …