The universe's biggest galaxies have both vast atmospheres and supermassive central
black holes. This article reviews how those two components of a large galaxy couple and …

We review current understanding of the population of radio galaxies and radio-loud quasars
from an observational perspective, focusing on their large-scale structures and dynamics …

The co-evolution between supermassive black holes and their environment is most directly
traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere …

Galaxy groups and poor clusters are more common than rich clusters, and host the largest
fraction of matter content in the Universe. Hence, their studies are key to understand the …

The radiative cooling time of the hot gas at the centres of cool cores in clusters of galaxies
drops down to 10 Myr and below. The observed mass cooling rate of such gas is very low …

The central regions of cool-core galaxy clusters harbour multiphase gas, with gas
temperatures ranging from to. Feedback from active galactic nuclei jets prevents the gas …

We present a multi-wavelength study of the gaseous medium surrounding the nearby active
galactic nucleus (AGN), Fornax A. Using MeerKAT, ALMA, and MUSE observations, we …

We present new, deep, narrow-and broadband Hubble Space Telescope observations of
seven of the most star-forming brightest cluster galaxies (BCGs). Continuum-subtracted [O II] …

Galaxy groups host the majority of matter and more than half of all the galaxies in the
Universe. Their hot (10 7 K), X-ray emitting intra-group medium (IGrM) reveals emission …

Recently, we have uncovered hidden cooling flows (HCFs) in the X-ray spectra of the central
brightest galaxies of 11 clusters, 1 group, and 2 elliptical galaxies. Here, we report such …