Influence of surface temperature (upper panel) and planet mass (lower panel) on the Love number k₂ of objects with R = 2 R_E. All models have an iron core, a MgO lower mantle, and a (H₂/He)_sol upper mantle. The magenta (violet) crosses mark the intersections of the iso-radius lines with the line corresponding to Earth-like (Mercury-like) Fe/MgO mass ratio. The curves for 3 M_E and surface temperatures of 300 K, 500 K, and 2500 K are longer because they were created with higher resolution in M₂ and M₃ (for Figs. 1 and 4) and therefore reach slightly higher values for M₂.