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 …

Although dark matter is a central element of modern cosmology, the history of how it became
accepted as part of the dominant paradigm is often ignored or condensed into an anecdotal …

We present cosmological results from the measurement of baryon acoustic oscillations
(BAO) in galaxy, quasar and Lyman-$\alpha $ forest tracers from the first year of …

In this paper, I go back to Bas van Fraassen's seminal discussion of perspectivity in the
context of scientific representation as a springboard for distinguishing between two possible …

Despite its continued observational successes, there is a persistent (and growing) interest in
extending cosmology beyond the standard model, Λ CDM. This is motivated by a range of …

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 …

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 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 present constraints on cosmological parameters using number counts as a function of
redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The …

A wealth of astronomical data indicate the presence of mass discrepancies in the Universe.
The motions observed in a variety of classes of extragalactic systems exceed what can be …