Rate of compact binary coalescences as a function of the redshift for the different metallicity values and for the different models Table 1: AZ (black continuous line with triangle symbol), BZ (black continuous line with square symbol), Az (gray continuous line with triangle symbol), Bz (gray continuous line with square symbol). Black lines correspond to high (solar) metallicity and gray lines to low metallicity, triangles represent optimistic models (A), squares pessimistic ones (B).