Λ₂(Λ₁) (left panel) and M(Λ) (right panel) relations for the M(R) sequences from Fig. 7. The values of the Λ parameter are based on the measurements of the chirp mass and the low-spin prior estimates of the component masses in the binary NS merger GW170817 (Abbott et al. 2017). Shaded areas in the left panel denote the estimated 50% and 90% confidence regions corresponding to the measurement (Abbott et al. 2017).