The ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz
GalaxiesClustersIndividualRX J1720.1+2638Astrophysics - Astrophysics of GalaxiesAstrophysics - Cosmology and Nongalactic AstrophysicsAstrophysics - High Energy Astrophysical Phenomena

