Distribution function of speeds of dark stellar remnants. We use the conservative estimate that only 10 per cent of dark remnants are kept in 10⁵ M_⊙ system due to SN kicks. We constrain the SN kick velocity distribution assuming it has a Maxwell-Boltzman shape for birth radius (Marks & Kroupa 2012, red curve) and for present day radius, 3 pc for GCs and for the UCDs we use the mass-radius relation from Dabringhausen et al. (2008; their Eq. (4), blue curve). The peak velocity, σ_kick, and v_esc values are stated.