Mass vs. radius for configurations with quark-hadron transition density ρ_tr = 3.4ρ₀ for four values of vector coupling G_V/G_S = 0,0.2,0.4,0.6. The purely hadronic sequence (i.e. the sequence that includes nucleons and hyperons) is shown by black solid line. The dashed lines and the gray solid lines show the branches where the 2SC and CFL quark phases are present. The filled circles mark the maximum masses of the sequences. The horizontal line shows the largest mass measurement to date (Demorest et al. 2010).