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 …

We present a new X-ray spectroscopic study of 22 luminous (2× 10 45≲ L bol/erg s− 1≲ 2×
10 46) active galactic nuclei (AGNs) at intermediate redshifts (0.1≲ z≲ 0.4), as part of the …

Black hole accretion discs can produce powerful outflowing plasma (disc winds), seen as
blue-shifted absorption lines in stellar and supermassive systems. These winds in quasars …

We present a newly discovered correlation between the wind outflow velocity and the X-ray
luminosity in the luminous (L bol∼ 1047erg s− 1) nearby (z= 0.184) quasar PDS 456. All the …

We present a qualitative search for ultra-fast outflows (UFOs) in excess variance spectra of
radio-quiet active galactic nuclei (AGNs). We analyse 42 sources from the spectroscopic …

We present a new X-Ray Accretion Disc-wind Emulator (xrade) based on the 2.5 D Monte
Carlo radiative transfer code that provides a physically motivated, self-consistent treatment …

We present the broad-band spectral analysis of all the six hard, intermediate, and soft state
NuSTAR observations of the recently discovered transient black hole X-ray binary MAXI …

Black hole binaries show equatorial disc winds at high luminosities, which apparently
disappear during the spectral transition to the low/hard state. This is also where the radio jet …

Abstract I Zwicky 1 (hereafter I Zw 1) is the prototype optical narrow-line Seyfert 1 galaxy. It is
also a nearby (z= 0.0611), luminous quasi-stellar object (QSO), accreting close to the …

We analyze three prototypical black hole X-ray binaries, 4U 1630–472, GRO J1655–40, and
H1743–322, in an effort to systematically understand the intrinsic state transition of the …