Fig. C.3
Measurement of the growth rate η and pattern speed ω0 of the mφ = 2 unstable modes of truncated Mestel discs with a random velocity given by q = 6 for various values of the truncation index νt = 6, 8. The basis coefficient plotted is associated with the basis element (ℓ,n) = (2,0), using the same basis elements as for the matrix method in Sect. 4.2.
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