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 …

Context. Large area catalogs of galaxy clusters constructed from ROSAT All-Sky Survey
provide the basis for our knowledge of the population of clusters thanks to long-term …

Expanding from previous work, we present weak-lensing (WL) measurements for a total
sample of 30 distant (z median= 0.93) massive galaxy clusters from the South Pole …

The hot intracluster medium (ICM) provides a unique laboratory to test multiscale physics in
numerical simulations and probe plasma physics. Utilizing archival Chandra observations …

Context. There is compelling evidence that active galactic nuclei (AGNs) in high-density
regions have undergone a different evolution than their counterparts in the field, indicating …

We search for a variation of the electromagnetic fine structure constant (α≡ e 2/ℏ c) using a
sample of 58 SZ selected clusters in the redshift range (0.2< z< 1.5) detected by the South …

Weak lensing measurements suffer from well-known shear estimation biases, which can be
partially corrected for with the use of image simulations. In this work we present an analysis …

Recent observations show that the star formation rate (SFR) in the Phoenix cluster's central
galaxy is∼ 500 M⊙ yr− 1. Even though Phoenix is a massive cluster (M 200≈ 2.0× 1015 …

We use imaging from the first three years of the Dark Energy Survey to characterize the
dynamical state of 288 galaxy clusters at 0.1≲ z≲ 0.9 detected in the South Pole Telescope …

The interaction of galaxies in clusters with the intergalactic gaseous medium and other
galaxies is considered. The causes for the appearance of gaseous and stellar “tails” and …