Full shell width W(z) at t = 700 yr as a function of altitude. z, for the high-density jet models in Fig. 3. Colored curves have one parameter varied from the reference run, from among the ambient core base density ρ_a0, jet semi-opening angle θj, initial jet base density ρ_j0. semi-amplitude of variability ∆V, period P, variability profile (sawtooth instead of sinusoidal), or jet radius R_j. Model parameter values are listed in Table 2. The covered measurements range from z ~ 800 au to z~ 12700au.