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 …

Chern–Simons modified gravity is an effective extension of general relativity that captures
leading-order, gravitational parity violation. Such an effective theory is motivated by anomaly …

A new N-body and hydrodynamical code, called RAMSES, is presented. It has been
designed to study structure formation in the universe with high spatial resolution. The code is …

We present gas and total mass profiles for 13 low-redshift, relaxed clusters spanning a
temperature range 0.7-9 keV, derived from all available Chandra data of sufficient quality. In …

Studies of galaxy clusters have proved crucial in helping to establish the standard model of
cosmology, with a Universe dominated by dark matter and dark energy. A theoretical basis …

We explore the possibility that the dark matter is a condensate of a very light vector boson.
Such a condensate could be produced during inflation, provided the vector mass arises via …

The most successful cosmological models to date envision structure formation as a
hierarchical process in which gravity is constantly drawing lumps of matter together to form …

ABSTRACT A new X-ray–selected and X-ray flux–limited galaxy cluster sample is
presented. Based on the ROSAT All-Sky Survey, the 63 brightest clusters with galactic …

We discuss the measurements of the galaxy cluster mass functions at z≈ 0.05 and z≈ 0.5
using high-quality Chandra observations of samples derived from the ROSAT PSPC All-Sky …

We use the largest complete sample of 64 galaxy clusters (HIghest X-ray FLUx Galaxy
Cluster Sample) with available high-quality X-ray data from Chandra, and apply 16 cool …