X-ray view of a unique relic radio mini-halo in a poor cluster of galaxies

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Scientific paper

MRC 0116+111 (z = 0.132) is a poor cluster of galaxies containing one of the most luminous known radio mini-halos. It differs from all other known mini-halos: it shows a double-lobe like diffuse structure surrounding a cD galaxy, but no signs of current AGN activity. Its morphology and integrated radio spectral index indicate that the relic electrons have been re-accelerated. X-ray data of this unusual system are completely lacking. This system presents the best opportunity to study the dynamical evolution of radio jet inated plasma bubbles in the cluster gas when the central AGN becomes inactive. The proposed observation will allow us to detect the system down to a luminosity of 8e40 erg/s. Non-detection will put a lower limit of B = 6.75 uG on the volume averaged magnetic field.

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