Synchronization from the energy dissipation rates computed with our model using a kinematical viscosity  d^-1 and Eq. (36). The different “families” are labeled by their corresponding eccentricity. The solid line is the synchronization timescale from Zahn’s (2008) relation, assuming a constant density structure and  ⟨ ν ⟩  = 1.4 × 10¹² cm² s^-1. This relation is valid only for e ~ 0.0. The dotted lines illustrate the trends for higher eccentricities from our computed models. Note that τ_syn ~ a^4.125 for high value of e and a. τ_syn is in units of years.