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Accretion onto supermassive black hole binaries

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arxiv 2405.14843 v1 pith:Y6IEPJUM submitted 2024-05-23 astro-ph.HE gr-qc

Eduardo M. Gutiérrez , Luciano Combi , Geoffrey Ryan This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords simulationsaccretionbinariesblackdifferentgiveholembhbs
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In this chapter, we give an overview of our current understanding of the physics of accreting massive black hole binaries (MBHBs), with a special focus on the latest developments in numerical simulations and General-Relativistic Magnetohydrodynamics (GRMHD) simulations in particular. We give a self-contained global picture of how to model accretion onto MBHBs, analyzing different aspects of the system such as the dynamics of the circumbinary disk, mini-disks, outflows, the role of magnetic fields, and electromagnetic signatures. We discuss important questions and open problems related to these systems, what are the advantages and disadvantages of the different numerical approaches, and what robust knowledge we have built from simulations.

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  1. Relativistic gas accretion onto supermassive black Hole binaries from inspiral through merger

    astro-ph.HE 2025-02 conditional novelty 7.0 of 10

    A new code hand-off enables a 3D GRMHD simulation of an equal-mass nonspinning supermassive black hole binary from 20M separation through merger and postmerger, showing minidisk dissolution, declining accretion, and a...

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