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 …

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 …

We present a new parametric lens model for the massive galaxy cluster Abell 2744 based
on new ultra-deep JWST imaging taken in the framework of the UNCOVER program. These …

We present a numerical study of dark matter halo concentrations in ΛCDM and self-similar
cosmologies. We show that the relation between concentration, c, and peak height, ν …

If dark matter has a large self-interaction scattering cross-section, then interactions among
dark-matter particles will drive galaxy and cluster haloes to become spherical in their …

We present results from a comprehensive lensing analysis in Hubble Space Telescope
(HST) data of the complete Cluster Lensing And Supernova survey with Hubble cluster …

We present a joint shear-and-magnification weak-lensing analysis of a sample of 16 X-ray-
regular and 4 high-magnification galaxy clusters at 0.19≲ z≲ 0.69 selected from the Cluster …

Weak gravitational lensing of background galaxies provides a direct probe of the projected
matter distribution in and around galaxy clusters. Here, we present a self-contained …

Gravitational lensing by clusters of galaxies offers a powerful probe of their structure and
mass distribution. Several research groups have developed techniques independently to …

We analyse strongly lensed images in eight galaxy clusters to measure their dark matter
density profiles in the radial region between 10 kpc and 150 kpc, and use this to constrain …