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Paper: Numerical Studies of the Accretion Disc Response to BH Recoil
Volume: 453, Advances in Computational Astrophysics: Methods, Tools, and Outcome
Page: 385
Authors: Rosotti, G.; Lodato, G.
Abstract: As a consequence of the kick received by the remnant of a supermassive black hole merger, the surrounding gaseous disc will readjust to a new equilibrium configuration, releasing in this process a large amount of energy through shocks. We considered an analytical model for the total energy released in the event, based on the assumption of angular momentum conservation per fluid element. We tested this model by numerical simulations using the 3D SPH code PHANTOM. We find that the model is in good agreement with simulations for out of plane kicks for different density profiles. For in-plane kicks, the assumption of the model breaks down because of angular momentum mixing. We find that the form of the bolometric light curve and the dynamics of the kicked disc strongly depend on the disc aspect ratio, an effect that can be captured only in 3D simulations.
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