70 AIM, UMR 7158, CEA/DRF, CNRS, Université Paris Diderot, Irfu/Service d'Astrophysique,
Centre de Saclay, FR-91191 Gif-sur-Yvette, France

The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-
messenger era is compelling. Detecting dual active galactic nuclei (AGN)–active SMBHs at …

The astrophysical origin of gravitational wave (GW) events discovered by LIGO/VIRGO
remains an outstanding puzzle. In active galactic nuclei (AGNs), compact-object binaries …

Several pulsar timing array (PTA) collaborations, including NANOGrav, EPTA, PPTA, and
CPTA, have announced the evidence for a stochastic signal consistent with a stochastic …

We present the to-date largest parameter space exploration of binaries in circumbinary discs
(CBDs), deriving orbital evolution prescriptions for eccentric, unequal mass binaries from our …

Pulsar timing array (PTA) collaborations in North America, Australia, and Europe, have been
exploiting the exquisite timing precision of millisecond pulsars over decades of observations …

We carry out 2D viscous hydrodynamical simulations of circumbinary accretion using the
moving-mesh code AREPO. We self-consistently compute the accretion flow over a wide …

Supermassive black holes (BHs) have been found in 85 galaxies by dynamical modeling of
spatially resolved kinematics. The Hubble Space Telescope revolutionized BH research by …

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 …

Understanding the formation and growth of supermassive black holes (SMBHs) at high
redshift represents a major challenge for theoretical models. In this work, we investigate the …