Table 1 Model Parameters Name S d R_fade ${t}_{{\rm{c}},0}$ ${t}_{{\rm{c}},1}$ ${t}_{\mathrm{multi}}$ t_d (Mpc^-1 kpc^-3) (kpc) (pc) (Myr) (Myr) (Myr) (Myr) n0.32-T1e7-H0.8C 776 0.3 19.4 33 28 72 7.0 n0.32-T1e7 990 0.3 19.4 33 28 85 6.0 n0.32-T1e7-H1.2C 1165 0.3 19.4 33 28 85 5.3 n0.32-T1e7-H1.4C 1359 0.3 19.4 33 28 - 4.7 n0.16-T1e7 248 0.5 24.5 67 57 180 11.0 n0.08-T1e7 61.9 1 30.8 133 114 375 19.0 n0.02-T1e7 3.87 4 48.8 534 456 1700 61.0 n0.08-T3e6 110 1 46.0 22 9 18 6.0 n0.08-T6e6 51.6 1 36.5 96 56 180 16.5 n0.08-T3e7 92.3 1 21.3 265 329 1162 25.0 n0.02-T3e6 6.85 4 72.9 90 35 79 20.0 n0.02-T3e6-hr 6.85 4 72.9 90 35 82 28.0 n0.02-T3e6-H1.1C 7.39 4 72.9 90 35 84 19.0 n0.02-T3e6-H1.2C 8.06 4 72.9 90 35 95 18.0 n0.02-T3e6-H1.4C 9.40 4 72.9 90 35 155 16.0 n0.02-T3e6-H1.8C 12.1 4 72.9 90 35 - 13.0 n0.002-T3e6 0.0685 20 157.2 905 351 850 130.0