Speaker
Description
Strong gravitational lensing is an astrophysical effect that happens when the gravitational field of a massive object bends light from a background source, creating multiple, often distorted, images of the same distant object. Accurate modelling of the mass distribution of strong gravitational lenses is crucial in order to use them as astrophysical and cosmological probes, such as for time-delay cosmography. We present the status of the robust modelling of WGJ0214-2105, a quadruply lensed quasar in the southern celestial hemisphere. Using the Gravitational Lens Efficient Explorer (GLEE) software and Hubble WFC3 imaging data in three photometric bands (F160W, F475X, and F814W). We construct a composite model of the system for the dark and baryonic mass distribution of the foreground lens galaxy and the light distributions of the galaxies, while also considering effects from nearby perturbers and the large-scale structure of the universe. This model will be instrumental for future time-delay cosmography, offering a robust mass distribution that enhances the system’s utility as a cosmological probe
| Abstract title | Modelling of the Quadruply Lensed Quasar WG J0214-2105 for Time-delay Cosmography |
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