Groups and clusters of galaxies are pervaded with hot gas (several tens to hundreds of million K), which emits in X-rays (mostly via bremsstrahlung) and which has been routinely observed with the last generations of X-ray telescopes. Because this intracluster medium (ICM) accounts for 70-90% of clusters' total baryonic content, it constitutes a central component in the growth and assembly of...
In the context of an evolutionary model, the outflow phase of an active galactic nucleus (AGN) occurs at the peak of its activity, once the central supermassive black hole (SMBH) is massive enough to generate sufficient power to counterbalance the potential well of the host galaxy. This outflow feedback phase plays a vital role in galaxy evolution. I will present results from our two recent...
Quasar winds blown from the accretion disc are potentially capable of expelling large quantities of gas from their host galaxies and may thus be an important mechanism for feedback. These winds are evident in rest-frame UV spectra in the form of blueshifted broad emission lines. How such winds are launched – and how such launching relates to the physical state of the accretion disc system that...
