Figure 16

Figure 16: γ-parameterization. Left panel: 1 and 2σ marginalized probability regions for constant γ and w: the green (shaded) regions are relative to the Reference case, the blue long-dashed ellipses to the Optimistic case, while the black short-dashed ellipses are the probability regions for the Pessimistic case. The red dot marks the fiducial model; two alternative models are also indicated for comparison. Right panel: 1 and 2σ marginalized probability regions for the parameters γ0 and γ1, relative to the Reference case (shaded yellow regions), to the Optimistic case (green long-dashed ellipses), and to the Pessimistic case (black dotted ellipses). Red dots represent the fiducial model, blue squares mark the DGP while triangles stand for the f(R ) model. Then, in the case of γ-parameterization, one could distinguish these three models (at 95% probability).