A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The total mass of a galaxy cluster is one of its most fundamental properties. Together with
the redshift, the mass links observation and theory, allowing us to use the cluster population …

The discovery of the accelerating universe in the late 1990s was a watershed moment in
modern cosmology, as it indicated the presence of a fundamentally new, dominant …

We present a catalog of galaxy clusters selected via their Sunyaev–Zel'dovich (SZ) effect
signature from 2500 deg 2 of South Pole Telescope (SPT) data. This work represents the …

Abstract Euclid is a European Space Agency medium-class mission selected for launch in
2020 within the cosmic vision 2015–2025 program. The main goal of Euclid is to understand …

We describe redMaPPer, a new red sequence cluster finder specifically designed to make
optimal use of ongoing and near-future large photometric surveys. The algorithm has …

The accelerating expansion of the universe is the most surprising cosmological discovery in
many decades, implying that the universe is dominated by some form of “dark energy” with …

We describe the observations and resultant galaxy cluster catalog from the 2770 deg 2
SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev …

Masses of clusters of galaxies from weak gravitational lensing analyses of ever larger
samples are increasingly used as the reference to which baryonic scaling relations are …

Formation of galaxy clusters corresponds to the collapse of the largest gravitationally bound
overdensities in the initial density field and is accompanied by the most energetic …