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Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
K. Rajpurohit, G. Brunetti, A. Bonafede +18
We present new LOFAR observations of the massive merging galaxy cluster MACS J0717.5+3745. The cluster hosts the most powerful radio halo known to date. These new observations, in…
Understanding the radio relic emission in the galaxy cluster MACS J0717.5+3745: spectral analysis
K. Rajpurohit, D. Wittor, R. J. van Weeren +21
Radio relics are diffuse, extended synchrotron sources that originate from shock fronts generated during cluster mergers. The massive merging galaxy cluster MACS J0717.5+3745 hosts…
The Coma cluster at LOFAR frequencies I: insights into particle acceleration mechanisms in the radio bridge
A. Bonafede, G. Brunetti, F. Vazza +18
Radio synchrotron emission from the bridges of low-density gas connecting galaxy clusters and groups is a challenge for particle acceleration processes. In this work, we analyse th…
The contribution of discrete sources to the sky temperature at 144 MHz
M. J. Hardcastle, T. W. Shimwell, C. Tasse +7
In recent years, the level of the extragalactic radio background has become a point of considerable interest, with some lines of argument pointing to an entirely new cosmological s…
LOFAR Detection of a Low-Power Radio Halo in the Galaxy Cluster Abell 990
N. D. Hoang, T. W. Shimwell, E. Osinga +10
Radio halos are extended (), steep-spectrum sources found in the central region of dynamically disturbed clusters of galaxies. Only a handful of radio halos have bee…
Abell 1430: A merging cluster with exceptional diffuse radio emission
M. Hoeft, C. Dumba, A. Drabent +16
Diffuse radio emission has been found in many galaxy clusters, predominantly in massive systems which are in the state of merging. The radio emission can usually be classified as r…