The next two decades are expected to open the door to the first coincident detections of
electromagnetic (EM) and gravitational-wave (GW) signatures associated with massive …

Throughout the Universe many powerful events are driven by strong gravitational effects that
require general relativity to fully describe them. These include compact binary mergers …

We present the results of two-dimensional (2D) hydrodynamical simulations of circumbinary
disk accretion using the finite-volume code DISCO. This code solves the 2D viscous Navier …

We have simulated the magnetohydrodynamic evolution of a circumbinary disk surrounding
an equal-mass binary comprising two non-spinning black holes during the period in which …

Odd radio circles (ORCs) are recently-discovered faint diffuse circles of radio emission, of
unknown cause, surrounding galaxies at moderate redshift (z∼ 0.2–0.6). Here, we present …

We perform a set of 36 nonprecessing black-hole binary simulations with spins either
aligned or counteraligned with the orbital angular momentum in order to model the final …

We present the first relativistic prediction of the electromagnetic emission from the
surrounding gas of a supermassive binary black hole system approaching merger. Using a …

We use long-run, high-resolution hydrodynamics simulations to compute the
multiwavelength light curves (LCs) from thermal disk emission around accreting equal-mass …

We review the dramatic progress in the simulations of compact objects and compact-object
binaries that has taken place in the first two decades of the twenty-first century. This includes …

We present results from the first fully general relativistic, magnetohydrodynamic (MHD)
simulations of an equal-mass black-hole binary (BHBH) in a magnetized, circumbinary …