It is now agreed that mergers play an essential role in the evolution of galaxies and therefore
that mergers of supermassive black holes (SMBHs) must have been common. We see the …

We present the results of a Palomar Transient Factory (PTF) archival search for blue
transients that lie in the magnitude range between" normal" core-collapse and …

We review the properties of the established Scaling Relations (SRs) of galaxies and active
galactic nuclei (AGN), focusing on their origin and expected evolution back in time, providing …

Black hole feedback is now a standard component of galaxy formation models. These
models predict that the impact of black hole activity on its host galaxy likely peaked at z= 2 …

Active galactic nuclei (AGNs) that show strong rest-frame optical/UV variability in their blue
continuum and broad line emission are classified as changing-look AGN, or at higher …

We investigate how the total radio luminosity of AGN-powered radio sources depends on
their accretion luminosity and the central black hole mass. Our studies cover about 7 orders …

Type II quasars are the long-sought luminous analogs of type 2 (narrow emission line)
Seyfert galaxies, suggested by unification models of active galactic nuclei (AGNs) and …

ASASSN-14ae is a candidate tidal disruption event (TDE) found at the centre of SDSS
J110840. 11+ 340552.2 (d≃ 200 Mpc) by the All-Sky Automated Survey for Supernovae …

We have carried out a systematic search for subparsec supermassive black hole (BH)
binaries among z≲ 0.7 Sloan Digital Sky Survey quasars. These are predicted by models of …

We present new near-infrared VLTI/GRAVITY interferometric spectra that spatially resolve
the broad Brγ emission line in the nucleus of the active galaxy IRAS 09149− 6206. We use …