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Fig. 6

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Power spectra of the local expansion velocity u (left panels) and corresponding maps of the (u,ρ,T) phase space (green) and projection onto (u,ρ)-plane (yellow) (right panels) in the dust nucleation zone for different monoperiodic excitation periods P = 716   d (upper), 450   d (middle), and 376   d (lower), respectively. The stroboscopic maps were obtained by sampling [u(n0.02P),   ρ(n0.02P),   T(n0.02P)] (green) and the Poincaré maps by [u(nP),   ρ(nP),   T(nP)] (black) for 1 ≤ n ≤  ⌊ tmax/P ⌋ ,n ∈ N. The excitation frequencies are highlighted in the spectra.

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