Constrained areas for given parameter combinations. On the left, the effective mass, m^*/m, is kept constant, and n₀, J, and L are not fixed. The shaded areas correspond to the parameter sets that generate stars compatible with astrophysical constraints. Additionally, the blue-shaded area shows all parameter sets within the ranges of the used nuclear parameters that lead to twin stars. On the right, the slope parameter, L, of the hadronic phase is kept constant, and n₀, J, and m^*/m are not fixed. The results of the first row are for a bag constant B = 0 MeV/fm³, which is increased in each descending row by 100 MeV/fm³.