The rates of change of binary semimajor axes and eccentricities for different disk viscosities, holding ﹩{ \mathcal M }=10﹩ constant. The bottom panel illustrates the surface densities from the e = 0.5 simulations for reference. Notably, the ﹩\nu =2.5\times {10}^{-4}﹩ disks have much larger cavities than those with ﹩\nu ={10}^{-3}﹩, resulting not in higher equilibrium eccentricities but instead in a more subdued orbital evolution and possibly lower equilibrium eccentricities. Moreover, disks with α viscosities have slightly smaller cavities, yet they drive binaries to somewhat larger equilibrium eccentricities.