Figure 4.

Log-log sensitivity of the damping time and of the period of the oscillations with respect to variations of different parameters of the modelℳ(5, 8, 15). The parameters are multiplied by a scale s ∈ (1/50, 50). The log(timescales) are represented as functions of log(s). Period and damping time are not represented on intervals of parameter values where oscillations are over-damped (the ratio of the damping time to the period is smaller than 1.75). Damping time is infinite and not represented for intervals of parameter values where oscillations are self-sustained. The latter intervals are limited by Hopf bifurcations where the damping time diverges.