Fig. 10: Initial conditions of N-body runs and results from Monte Carlo models.
From: Dissecting the properties of neutron star–black hole mergers originating in dense star clusters
a BH mass distribution. Distribution of BH masses (mBH) for N-body models with initial metallicity Z = 0.0002 (red filled steps) and Z = 0.02 (black steps). b Semimajor axis distribution for Monte Carlo and N-body simulations. Binary semimajor axis dstribution for model in which a black hole–star binary scatters over a single neutron star (BHSTNS). Filled steps represent Monte Carlo models with a velocity dispersion σ in the range 3–7 kilometer per second, obtained with the MOCCA code, whereas the open black steps identify direct N-body models assuming a velocity dispersion σ = 5 km/s. Note that the semimajor axis is normalized to the hard-binary separation. c Binary semimajor axis dstribution for model in which a neutron star–star binary scatters over a single black hole (NSSTBH). As in panel b but here we refer to the other configuration explored.
