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 study of the dynamical evolution of massive black hole pairs in mergers is crucial in the
context of a hierarchical galaxy formation scenario. The timescales for the formation and the …

Hard X-ray (≥ 10 keV) observations of active galactic nuclei (AGNs) can shed light on some
of the most obscured episodes of accretion onto supermassive black holes. The 70-month …

Supermassive black hole binaries (SMBHBs) at sub-parsec separations should be common
in galactic nuclei, as a result of frequent galaxy mergers. Hydrodynamical simulations of …

Dual supermassive black holes (SMBHs) at∼ kiloparsec scales are the progenitor
population of SMBH mergers and play an important role in understanding the pairing and …

We present new photometry of 16 local Seyferts including 6 Compton-thick sources in N-
band filters around 12-μm, obtained with the VISIR instrument on the 8-m Very Large …

Dual active galactic nuclei (AGNs) and offset AGNs are kpc-scale separation supermassive
black holes pairs created during galaxy mergers, where both or one of the black holes are …

Gravitational wave (GW) emissions from extreme-mass-ratio inspirals (EMRIs) are promising
sources for low-frequency GW detectors. They result from a compact object, such as a stellar …

In the last few years, it became possible to observationally resolve galaxies with two distinct
nuclei in their centre. For separations smaller than 10 kpc, dual and offset active galactic …

Supermassive black holes (SMBHs) have been detected in the centers of most nearby
massive galaxies. Galaxies today are not only the products of billions of years of galaxy …