Streaming instabilities in weakly ionized protoplanetary discs: The ambipolar streaming instability

Open Access

Fig. 5

Velocity and magnetic field components along $\hat{n} = \hat{k} \times \hat{b}$ $Mathematical equation: $\[\hat{\mathbf{n}}=\hat{\mathbf{k}} \times \hat{\mathbf{b}}\]$$ as a function of vertical wavenumber ${\tilde{K}}_{z}$ $Mathematical equation: $\[\tilde{K}_{z}\]$$ for ϵ = 3, St = 0.1, Λ_AD = 100 (upper panel), and ϵ = 0.2, St = 0.001, and Λ_AD = 10 (lower panel). The azimuthal field was fixed to B_y/B_z = −1 and the radial wavenumber to ${\tilde{K}}_{x} = 10^{3}$ $Mathematical equation: $\[\tilde{K}_{x}=10^{3}\]$$ .

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