A dynamically cold disk galaxy in the early Universe

F Rizzo, S Vegetti, D Powell, F Fraternali, JP McKean… - Nature, 2020 - nature.com
The extreme astrophysical processes and conditions that characterize the early Universe
are expected to result in young galaxies that are dynamically different from those observed …

Dynamical properties of z ∼4.5 dusty star-forming galaxies and their connection with local early-type galaxies

F Rizzo, S Vegetti, F Fraternali… - Monthly Notices of the …, 2021 - academic.oup.com
There is a large consensus that gas in high-z galaxies is highly turbulent, because of a
combination of stellar feedback processes and gravitational instabilities driven by mergers …

A lensed radio jet at milli-arcsecond resolution–II. Constraints on fuzzy dark matter from an extended gravitational arc

DM Powell, S Vegetti, JP McKean… - Monthly Notices of …, 2023 - academic.oup.com
Using a single gravitational lens system observed at≲ 5 mas resolution with very long
baseline interferometry, we place a lower bound on the mass of the fuzzy dark matter (FDM) …

A lensed radio jet at milliarcsecond resolution I: Bayesian comparison of parametric lens models

DM Powell, S Vegetti, JP McKean… - Monthly Notices of …, 2022 - academic.oup.com
We investigate the mass structure of a strong gravitational lens galaxy at z= 0.350, taking
advantage of the milliarcsecond (mas) angular resolution of very long baseline …

PyAutoLens: Open-source strong gravitational lensing

J Nightingale, RG Hayes, A Kelly… - arXiv preprint arXiv …, 2021 - arxiv.org
Strong gravitational lensing, which can make a background source galaxy appears multiple
times due to its light rays being deflected by the mass of one or more foreground lens …

Halo concentration strengthens dark matter constraints in galaxy–galaxy strong lensing analyses

NC Amorisco, J Nightingale, Q He… - Monthly Notices of …, 2022 - academic.oup.com
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 …

Complex angular structure of three elliptical galaxies from high-resolution ALMA observations of strong gravitational lenses

HR Stacey, DM Powell, S Vegetti, JP McKean… - Astronomy & …, 2024 - aanda.org
The large-scale mass distributions of galaxy-scale strong lenses have long been assumed
to be well described by a singular ellipsoidal power-law density profile with external shear …

Strong lens modelling: comparing and combining Bayesian neural networks and parametric profile fitting

J Pearson, J Maresca, N Li, S Dye - Monthly Notices of the Royal …, 2021 - academic.oup.com
The vast quantity of strong galaxy–galaxy gravitational lenses expected by future large-scale
surveys necessitates the development of automated methods to efficiently model their mass …

SLITRONOMY: Towards a fully wavelet-based strong lensing inversion technique

A Galan, A Peel, R Joseph, F Courbin… - Astronomy & …, 2021 - aanda.org
Strong gravitational lensing provides a wealth of astrophysical information on the baryonic
and dark matter content of galaxies. It also serves as a valuable cosmological probe by …

Modelling high-resolution ALMA observations of strongly lensed dusty star-forming galaxies detected by Herschel

J Maresca, S Dye, A Amvrosiadis… - Monthly Notices of …, 2022 - academic.oup.com
We present modelling of∼ 0.1 arcsec resolution Atacama Large Millimetre/submillimetre
Array imaging of seven strong gravitationally lensed galaxies detected by the Herschel …