The Planck clusters in the LOFAR sky-I. LoTSS-DR2: new detections and sample overview

A Botteon, TW Shimwell, R Cassano, V Cuciti… - Astronomy & …, 2022 - aanda.org
Context. Relativistic electrons and magnetic fields permeate the intra-cluster medium (ICM)
and manifest themselves as diffuse sources of synchrotron emission observable at radio …

LOFAR observations of galaxy clusters in HETDEX-Extraction and self-calibration of individual LOFAR targets

RJ Van Weeren, TW Shimwell, A Botteon… - Astronomy & …, 2021 - aanda.org
Diffuse cluster radio sources, in the form of radio halos and relics, reveal the presence of
cosmic rays and magnetic fields in the intracluster medium (ICM). These cosmic rays are …

Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA

CJ Riseley, E Bonnassieux, T Vernstrom… - Monthly Notices of …, 2022 - academic.oup.com
Abell 3266 is a massive and complex merging galaxy cluster that exhibits significant
substructure. We present new, highly sensitive radio continuum observations of Abell 3266 …

Exploring the spectral properties of radio relics–I: integrated spectral index and Mach number

D Wittor, S Ettori, F Vazza, K Rajpurohit… - Monthly Notices of …, 2021 - academic.oup.com
Radio relics are the manifestation of electrons presumably being shock (re-) accelerated to
high energies in the outskirts of galaxy clusters. However, estimates of the shocks' strength …

A MeerKAT-meets-LOFAR study of Abell 1413: a moderately disturbed non-cool-core cluster hosting a~ 500 kpc 'mini'-halo

CJ Riseley, N Biava, G Lusetti… - Monthly Notices of …, 2023 - academic.oup.com
Many relaxed cool-core clusters host diffuse radio emission on scales of hundreds of
kiloparsecs: mini-haloes. However, the mechanism responsible for generating them, as well …

Dissecting nonthermal emission in the complex multiple-merger galaxy cluster Abell 2744: Radio and X-ray analysis

K Rajpurohit, F Vazza, RJ Van Weeren, M Hoeft… - Astronomy & …, 2021 - aanda.org
We present the first deep low frequency radio observations of the massive and highly
disturbed galaxy cluster Abell 2744 using the upgraded Giant Metrewave Radio Telescope …

Cosmic-ray acceleration and magnetic fields in galaxy clusters and beyond: Insights from radio observations

D Wittor - Universe, 2023 - mdpi.com
The discovery of diffuse radio emission in galaxy clusters proved the existence of energetic
cosmic-ray electrons and cosmic magnetic fields on Mpc-scales in the Universe …

Magnetogenesis and the cosmic web: A joint challenge for radio observations and numerical simulations

F Vazza, N Locatelli, K Rajpurohit, S Banfi… - Galaxies, 2021 - mdpi.com
The detection of the radio signal from filaments in the cosmic web is crucial to distinguish
possible magnetogenesis scenarios. We review the status of the different attempts to detect …

On the challenges of cosmic-ray proton shock acceleration in the intracluster medium

D Wittor - New Astronomy, 2021 - Elsevier
Galaxy clusters host the largest particle accelerators in the Universe: Shock waves in the
intracluster medium (ICM), a hot and ionised plasma, that accelerate particles to high …

Morphology of radio relics–I. What causes the substructure of synchrotron emission?

P Dominguez-Fernandez, M Brüggen… - Monthly Notices of …, 2021 - academic.oup.com
High-resolution radio observations of cluster radio relics often show complex spatial and
spectral features. However, it is not clear what these features reveal about the underlying …