Outflows from active galactic nuclei (AGNs) are one of the fundamental mechanisms by
which the central supermassive black hole interacts with its host galaxy. Detected in≥ 50 …

Context. The changing-look phenomenon observed in a growing number of active galaxies
challenges our understanding of the accretion process close to a black hole. Aims. We …

The Seyfert-1 galaxy NGC 3516 has undergone major spectral changes in recent years. In
2017 we obtained Chandra, NuSTAR, and Swift observations during its new low-flux state …

Outflows in active galactic nuclei (AGN) are considered a promising candidate for driving
AGN feedback at large scales. However, without information on the density of these outflows …

The mechanism of thermal driving for launching mass outflows is interconnected with
classical thermal instability (TI). In a recent paper, we demonstrated that as a result of this …

The origin, geometry, and kinematics of the broad-line region (BLR) gas in quasars and
active galactic nuclei (AGN) are uncertain. We demonstrate that clumpy biconical disc winds …

NGC 4151 is the brightest Seyfert 1 nucleus in X-rays. It was the first object to show short
time delays in the Fe K band, which were attributed to relativistic reverberation, providing a …

The relationship between warm absorber (WA) outflows of active galactic nuclei and nuclear
obscuration activities caused by optically thick clouds (obscurers) crossing the line of sight is …

We model the ultraviolet spectra of the Seyfert 1 galaxy NGC 5548 obtained with the Hubble
Space Telescope during the 6 month reverberation mapping campaign in 2014. Our model …

Abstract The Space Telescope and Optical Reverberation Mapping Project (AGN STORM)
on NGC 5548 in 2014 is one of the most intensive multiwavelength AGN monitoring …