576 citations · 12k across the 198 of their papers we have counts for
15 papers · 1 filter
WENO-Wombat: Scalable Fifth-Order Constrained-Transport Magnetohydrodynamics for Astrophysical Applications
J. M. F. Donnert, H. Jang, P. Mendygral +3
Due to increase in computing power, high-order Eulerian schemes will likely become instrumental for the simulations of turbulence and magnetic field amplification in astrophysical…
Ultra-steep spectrum emission in the merging galaxy cluster Abell 1914
S. Mandal, H. T. Intema, T. W. Shimwell +14
A number of radio observations have revealed the presence of large synchrotron-emitting sources associated with the intra-cluster medium. There is strong observational evidence tha…
Characterizing the radio emission from the binary galaxy cluster merger Abell 2146
D. N. Hoang, T. W. Shimwell, R. J. van Weeren +8
Collisions of galaxy clusters generate shocks and turbulence in the intra-cluster medium (ICM). The presence of relativistic particles and magnetic fields is inferred through the d…
The spectacular cluster chain Abell 781 as observed with LOFAR, GMRT, and XMM-Newton
A. Botteon, T. W. Shimwell, A. Bonafede +20
A number of merging galaxy clusters show the presence of large-scale radio emission associated with the intra-cluster medium (ICM). These synchrotron sources are generally classifi…
Towards Exascale Simulations of the ICM Dynamo with WENO-Wombat
J. Donnert, H. Jang, P. Mendygral +3
In galaxy clusters, modern radio interferometers observe non-thermal radio sources with unprecedented spatial and spectral resolution. For the first time, the new data allows to in…
Thermal and non-thermal connection in radio mini-halos
Alessandro Ignesti, Gianfranco Brunetti, Myriam Gitti +1
Several cool-core clusters are known to host a radio mini-halo, a diffuse, steep-spectrum radio source located in their cores, thus probing the presence of non-thermal components a…
SKA-Athena Synergy White Paper
R. Cassano, R. Fender, C. Ferrari +35
The Advanced Telescope for High Energy Astrophysics (Athena) is the X-ray observatory large mission selected by the European Space Agency (ESA), within its Cosmic Vision 2015-2025…
Deep LOFAR 150 MHz imaging of the Boötes field: Unveiling the faint low-frequency sky
E. Retana-Montenegro, H. J. A. Röttgering, T. W. Shimwell +5
We have conducted a deep survey (with a central rms of ) with the LOw Frequency ARray (LOFAR) at 120-168 MHz of the Boötes field, with an angular resolution of $3.9…
Radio-continuum surveys with SKA and LOFAR: a first look at the perspectives for radio mini-halos
Myriam Gitti, Gianfranco Brunetti, Rossella Cassano +1
Diffuse synchrotron radio emission has been observed in a number of cool-core clusters on scales comparable to that of the cooling region. These radio sources are called `mini-halo…
First evidence of diffuse ultra-steep-spectrum radio emission surrounding the cool core of a cluster
Federica Savini, Annalisa Bonafede, Marcus Brueggen +14
Diffuse synchrotron radio emission from cosmic-ray electrons is observed at the center of a number of galaxy clusters. These sources can be classified either as giant radio halos,…
LOFAR discovery of radio emission in MACSJ0717.53745
A. Bonafede, M. Brüggen, D. Rafferty +16
We present results from LOFAR and GMRT observations of the galaxy cluster MACSJ0717.53745. The cluster is undergoing a violent merger involving at least four sub-clusters, a…
Radio observations of the double-relic galaxy cluster Abell 1240
D. N. Hoang, T. W. Shimwell, R. J. van Weeren +16
We present LOFAR MHz images of the merging galaxy cluster Abell 1240 that hosts double radio relics. In combination with the GMRT MHz and VLA GHz data, we…
LOFAR discovery of a double radio halo system in Abell 1758 and radio/X-ray study of the cluster pair
A. Botteon, T. W. Shimwell, A. Bonafede +14
Radio halos and radio relics are diffuse synchrotron sources that extend over Mpc-scales and are found in a number of merger galaxy clusters. They are believed to form as a consequ…
Discovery of large-scale diffuse radio emission in low-mass galaxy cluster Abell 1931
M. Brüggen, D. Rafferty, A. Bonafede +12
Extended, steep-spectrum radio synchrotron sources are pre-dominantly found in massive galaxy clusters as opposed to groups. LOFAR Two-Metre Sky Survey images have revealed a diffu…
Search for low-frequency diffuse radio emission around a shock in the massive galaxy cluster MACS J0744.9+3927
Amanda Wilber, Marcus Brüggen, Annalisa Bonafede +11
Merging galaxy clusters produce low Mach number shocks in the intracluster medium. These shocks can accelerate electrons to relativistic energies that are detectable at radio frequ…