Fig. 4
From: Alfvén wave evolution into magnetic filaments in 3-D space plasma
Time evolution of the density and magnetic field fluctuations: longitudinal daughter mode \(S_Z(0,0,9)\) and Alfvén sideband Z(5, 0, 9) are shown in a and b, and the longitudinal daughter mode \(S_F(0,0,8)\) and Alfvén sideband \(F(-\,5,0,8)\) in c and d. For comparison, the Alfvén pump wave A(5, 0, 0) and the dominant daughter modes \(S_D(9,0,0)\) and \(D(-\,4,0,0)\) provided by the field-aligned decay instability are also given