A comparison of black hole growth in galaxy mergers with Gasoline and Ramses

摘要: Supermassive black hole dynamics during galaxy mergers is crucial in determining the rate of and cosmic growth. As simulations achieve higher resolution, it becomes important to assess whether influenced by treatment interstellar medium different simulation codes. We here compare growth with two codes: Smoothed Particle Hydrodynamics code Gasoline, Adaptive Mesh Refinement Ramses. seek identify predictions these models that are robust despite differences hydrodynamic methods implementations sub-grid physics. find general behavior consistent between Black accretion minimal while galaxies well-separated (and even as they "fly-by" within 10 kpc at first pericenter). At late stages, when pass a few kpc, tidal torques drive nuclear gas inflow triggers bursts accompanied star formation. also note quantitative discrepancies model-dependent: our Ramses show less formation growth, smoother distribution larger clumps filaments, than Gasoline simulations. attribute primarily for fueling feedback thermodynamics. The main conclusion exist quantitatively codes, this should be kept mind making comparisons observations. However, reassuringly, both codes capture same dynamical behaviors terms triggering accretion, formation, dynamics.