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 …

High resolution X-ray spectroscopy of the hot gas in galaxy clusters has shown that the gas
is not cooling to low temperatures at the predicted rates of hundreds to thousands of solar …

We review the X-ray spectra of the cores of clusters of galaxies. Recent high resolution X-ray
spectroscopic observations have demonstrated a severe deficit of emission at the lowest X …

We study the interplay among cooling, heating, conduction and magnetic fields in
gravitationally stratified plasmas using simplified, plane-parallel numerical simulations …

We provide an analytic framework for interpreting observations of multiphase circumgalactic
gas that is heavily informed by recent numerical simulations of thermal instability and …

We present evidence for cosmological gas accretion on to spiral galaxies in the local
universe. The accretion is seen through its effects on the dynamics of the extraplanar neutral …

Most galaxies comparable to or larger than the mass of the Milky Way host hot, X-ray
emitting atmospheres, and many such galaxies are radio sources. Hot atmospheres and …

In several models of galaxy formation feedback occurs in cycles or mainly at high redshift. At
times and in regions where feedback heating is ineffective, hot gas in the galaxy halo is …

The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM)
remains one of the last missing key ingredients in understanding the microphysical …

Active galactic nuclei are clearly heating gas in 'cooling flows'. The effectiveness and spatial
distribution of the heating are controversial. We use three-dimensional simulations on …