GOVONI, FEDERICAFEDERICAGOVONIOrrù, E.E.OrrùBONAFEDE, ANNALISAANNALISABONAFEDEIacobelli, M.M.IacobelliPaladino, RositaRositaPaladinoVAZZA, FRANCOFRANCOVAZZAMURGIA, MATTEOMATTEOMURGIAVACCA, VALENTINAVALENTINAVACCAGiovannini, GabrieleGabrieleGiovanniniFeretti, L.L.FerettiLoi, F.F.LoiBERNARDI, GIANNIGIANNIBERNARDIFerrari, C.C.FerrariPizzo, R. F.R. F.PizzoGheller, C.C.GhellerManti, S.S.MantiBrüggen, M.M.BrüggenBRUNETTI, GIANFRANCOGIANFRANCOBRUNETTICASSANO, RossellaRossellaCASSANODe Gasperin, F.F.De GasperinEnßlin, T. A.T. A.EnßlinHoeft, M.M.HoeftHorellou, C.C.HorellouJunklewitz, H.H.JunklewitzRöttgering, H. J. A.H. J. A.RöttgeringScaife, A. M. M.A. M. M.ScaifeShimwell, T. W.T. W.Shimwellvan Weeren, R. J.R. J.van WeerenWise, M.M.Wise2021-01-182021-01-1820190036-8075http://hdl.handle.net/20.500.12386/29820Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbulence in the intracluster gas. We observed a ridge of radio emission connecting the merging galaxy clusters Abell 0399 and Abell 0401 with the Low-Frequency Array (LOFAR) telescope network at 140 megahertz. This emission requires a population of relativistic electrons and a magnetic field located in a filament between the two galaxy clusters. We performed simulations to show that a volume-filling distribution of weak shocks may reaccelerate a preexisting population of relativistic particles, producing emission at radio wavelengths that illuminates the magnetic ridge.STAMPAenArticle10.1126/science.aat75002-s2.0-85067439923000471079600005https://science.sciencemag.org/content/364/6444/9812019Sci...364..981GFIS/05 - ASTRONOMIA E ASTROFISICA