Excitation of chorus-like waves by temperature anisotropy in dipole research experiment (DREX): A numerical study Project supported by the National Natural Science Foundation of China (Grant Nos. 41674165, 41631071, 41474142, and 41674174) and the China Postdoctoral Science Foundation (Grant No. 2015M570283). |
(color online) Normalized power spectrum densities which vary in the frequency domain with different cold plasma densities. The parallel thermal velocity w∥ = 0.05 and hot plasma frequency ωph = 1 are the same for all cases. Other parameters are: w⊥ = 0.15, ωpe = 3 for panel (a); w⊥ = 0.17, ωpe = 3 for panel (b); w⊥ = 0.17, ωpe = 6 for panel (c); w⊥ = 0.2, ωpe = 6 for panel (d); w⊥ = 0.2, ωpe = 8 for panel (e); and w⊥ = 0.25, ωpe = 8 for panel (f). |