00365nas a2200121   4500000000100000000000100001008004100002100003300043245008900076856006400165300000600229490000800235       2019                            d1 aet The EHT Collaboration al.00aFirst M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring  uhttps://iopscience.iop.org/article/10.3847/2041-8213/ab0f43  a50 v875