Most, if not all, galaxies harbor at their center a supermassive black hole (SMBH) that sculpts
the dynamics of objects inhabiting galactic nuclei. SMBH binaries (SMBHBs) are expected to …

Despite solid theoretical and observational grounds for the pairing of supermassive black
holes (SMBHs) after galaxy mergers, definitive evidence for the existence of close (sub …

In this work, we use general relativistic magnetohydrodynamics simulations to explore the
effect of spin orientation on the dynamics of gas in the vicinity of merging black holes. We …

Massive black hole binaries (MBHBs) could be the loudest gravitational-wave (GW) sources
in the millihertz (mHz) GW band, but their dynamical evolution may stall when the black …

We present general relativistic magnetohydrodynamic simulations of merging equal-mass
spinning black holes embedded in an equatorial thin slab of magnetized gas. We explore …

We have performed numerical calculations of a binary interacting with a gas disk, using
eleven different numerical methods and a standard binary-disk setup. The goal of this study …

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 …

We perform general relativistic simulations of magnetized, accreting disks onto spinning
black hole binaries with mass ratio q≡ M 1, irr/M 2, irr= 1, 2 and 4. The magnitude of the …