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 …

Galaxy clusters as gravitational lenses play a unique role in astrophysics and cosmology:
they permit map** the dark matter distribution on a range of scales; they reveal the …

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 …

What are the faintest distant galaxies we can see with the Hubble Space Telescope (HST)
now, before the launch of the James Webb Space Telescope? This is the challenge taken …

Cold dark matter (CDM) constitutes most of the matter in the Universe. The interplay
between dark and luminous matter in dense cosmic environments, such as galaxy clusters …

We report a new analysis of the Hubble Frontier Fields clusters Abell 2744 and MACS 0416
using wavelet decomposition to remove the cluster light, enabling the detection of highly …

ABSTRACT With the Hubble Frontier Fields program, gravitational lensing has provided a
powerful way to extend the study of the ultraviolet luminosity function (LF) of galaxies at∼ 6 …

We present a new strong lensing (SL) model of the Hubble Frontier Fields (HFF) galaxy
cluster Abell 2744, at z= 0.3072, by exploiting archival Hubble Space Telescope (HST) …

The first deep field images from the James Webb Space Telescope (JWST) of the galaxy
cluster SMACS J0723. 3-7327 reveal a wealth of new lensed images at uncharted infrared …

We discuss the spectral energy distributions and physical properties of six galaxies whose
photometric redshifts suggest they lie beyond a redshift z≃ 9. Each was selected on account …