Left: parameter-space plot showing the evolution of the MS-MBH binary (α = 0.8) for different initial D_p/R_t and λ. The brown contours indicate the regions in which the final stellar mass (M_*,f) reaches 50% and 20% of the initial mass (M_*,0). The pink and cyan regions correspond to orbital circularization and binary unbinding, respectively. The red dotted line marks the approximate boundary separating regimes in which the star or the orbit is disrupted first (Equation (8)). The prompt-disruption region is shaded in gray. Right: parameter-space plot of the evolution for different initial D_p/R_t and α, with λ = 0. The pink region now corresponds to e_f < 0.95 rather than 0.90. Further, no region with e_f > 0.99 is present.