WIDE (left panel) and CLOSE (right panel) double degenerate delay time distributions of Greggio (2005) normalised to their maximum (dashed black curves). The form of the WIDE G05 DTD is defined by the parameters τ_n,x = 0.4 Gyr, β_a = 0, while for the CLOSE G05 DTD, we use the combination τ_n,x = 0.4 Gyr, β_g = −0.975. The WIDE DTD is modelled as six Gaussian curves, eight exponentials, and two t⁻¹ functions (solid purple line); while the CLOSE DTD requires twelve Gaussian curves, nine exponentials, and four t⁻¹ functions (solid pink line). Vertical dotted lines indicate the time domain (τ₁, τ₂)_G,E,I of the fitting for each section of the DTD (see Table 2 for the adopted parameters).