Discovery of inverse-Compton X-ray emission and estimate of the
volume-averaged magnetic field in a galaxy group
Discovery of inverse-Compton X-ray emission and estimate of the
volume-averaged magnetic field in a galaxy group
Observed in a significant fraction of clusters and groups of galaxies, diffuse radio synchrotron emission reveals the presence of relativistic electrons and magnetic fields permeating large-scale systems of galaxies. Although these non-thermal electrons are expected to upscatter cosmic microwave background photons up to hard X-ray energies, such inverse-Compton (IC) X-ray …