lenstronomy is an Astropy-affiliated Python package for gravitational lensing simulations and
analyses. lenstronomy was introduced by Birrer and Amara (2018) and is based on the …

Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution,
leading to an observed correlation between SMBH mass M BH and host galaxy velocity …

Context. The SPT0311–58 system resides in a massive dark-matter halo at z∼ 6.9. It hosts
two dusty galaxies (E and W) with a combined star formation rate (SFR) of∼ 3500 M⊙ yr− 1 …

Massive, starbursting galaxies in the early Universe represent some of the most extreme
objects in the study of galaxy evolution. One such source is HFLS3 (z∼ 6.34), which was …

When strong gravitational lenses are to be used as an astrophysical or cosmological probe,
models of their mass distributions are often needed. We present a new, time-efficient …

The distribution of dark and luminous matter can be mapped around galaxies that
gravitationally lens background objects into arcs or Einstein rings. New surveys will soon …

ABSTRACT A defining prediction of the cold dark matter cosmological model is the
existence of a very large population of low-mass haloes. This population is absent in models …

Quasars experiencing strong lensing offer unique viewpoints on subjects related to the
cosmic expansion rate, the dark matter profile within the foreground deflectors, and the …

The cold dark matter (DM) model predicts that every galaxy contains thousands of DM
subhaloes; almost all other DM models include a physical process that smooths away the …

Observations suggest that the dark matter and stars in early-type galaxies 'conspire'to
produce a surprisingly simple distribution of total mass, ρ (r)∝ ρ− γ, with γ≈ 2. We measure …