Parallel sessions

In this session we will bring together observers and simulators working with gravitational lenses in order to take stock of our present understanding of dark matter substructure, identify gaps in our knowledge, and prepare for the rich new datasets that will soon be on the horizon.

The distribution of dark matter on galaxy to cluster scales plays an important role in many aspects of Astronomy. Yet there are currently significant tensions between our theoretical understanding of this "substructure" and the picture we derive from observations. With the ability to probe dark (and baryonic) matter over a wide range of physical sizes and mass ranges, gravitational lensing is a particularly powerful and efficient tool for investigating these discrepancies. Adding to that, with current and upcoming missions (such as HST, JWST, Euclid, ALMA, SDSS-V, DESI, LSST, and the ELT) expected to find hundreds of thousands of new cluster and galaxy-galaxy lenses, now is the perfect time to address these problems head-on.

By combining this wealth of data with the latest dark matter and hydrodynamical cosmological simulations of our Universe, we can now hope to measure precise cosmological parameters and test the Lambda-CDM paradigm in a competitive way, all while tracing galaxy clusters’ distribution of substructures and 3D assembly history, the "smooth" shape of individual galaxy halos and their satellites, and even the self-interacting nature of dark matter itself.

Schedule:

Session 1
15:30 Hannah Turner “Stellar dynamical modelling of the ‘Jackpot’ triple-source lens using deep MUSE observations”
15:42 Mohamed Shaaban “Probing Clusters on the Cheap with SuperBIT”
15:54 Guillaume Mahler “Strong lensing in 100 cluster cores : when the number brings an answer to structure formation”
16:06 Giulia Despali “Detecting low mass haloes with strong lensing: predictions and forecasts from simulations”
16:18 Chris Fassnacht “A Constraint on Warm Dark Matter Models from Lensed AGN Flux Ratios”
16:30 Devon Powell “Bayesian visibility-space modelling of interferometric gravitational lens observations at high angular resolution”
16:42 Anna Niemiec “Combining strong and weak lensing modeling of galaxy clusters in the BUFFALO survey”

Session 2
09:00 Noemi Anau Montel “Simulation-based inference of the population properties of dark matter subhalos in strong gravitational lenses”
09:12 Joseph Allingham “Constraining interacting dark matter using lensing models”
09:24 Catherine Cerny “Examining the Core-Cusp Problem with Strong Gravitational Lensing”
09:36 Adriano Poci “Detailed Dynamical Modelling of Strong-Lens Galaxies - Spatial Distributions of Baryons and Dark Matter”
09:48 Philippa Hartley “Substructure studies from the observation of a trio of strongly lensed radio quiet quasars"
10:00 James Nightingale “Constraining the Dark Matter Particle With Strong Gravitational Lensing”
10:12 Alexander Hill “Assessing the Morphology and Intrinsic Alignment of Radio Galaxies in the EAGLE Simulation Suite”
10:24 Kyle Oman “KiDS weak lensing constraints on dark matter and gravity around isolated galaxies”
10:26 Sut-Ieng Tam “Lensing detection of substructures around the post-merger galaxy cluster MS0451-03”