The study of ultraluminous X-ray sources (ULXs) has changed dramatically over the last
decade. In this review we first describe the most important observations of ULXs in various …

We review observations of ultraluminous X-ray sources (ULXs). X-ray spectroscopic and
timing studies of ULXs suggest a new accretion state distinct from those seen in Galactic …

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 demonstrate a novel technology that combines the power of the multi-object
spectrograph with the spatial multiplex advantage of an integral field spectrograph (IFS). The …

Powerful winds driven by active galactic nuclei are often thought to affect the evolution of
both supermassive black holes and their host galaxies, quenching star formation and …

Active galactic nuclei (AGN) drive fast winds in the interstellar medium of their host galaxies.
It is commonly assumed that the high ambient densities and intense radiation fields in …

Since the 1960s, when the connection between quasar energetics and supermassive black
holes was first established, galactic nuclei have remained objects of intense interest to …

Context. Blue-shifted Fe K absorption lines have been detected in recent years between 7
and 10 keV in the X-ray spectra of several radio-quiet AGNs. The derived blue-shifted …

Mrk 231 is a nearby ultra-luminous IR galaxy exhibiting a kpc-scale, multi-phase AGN-driven
outflow. This galaxy represents the best target to investigate in detail the morphology and …

The existence of ionized X-ray absorbing layers of gas along the line of sight to the nuclei of
Seyfert galaxies is a well established observational fact. This material is systematically …