Gravitational Lensing in the Era of JWST, Euclid, and Beyond

Dear Colleagues,

Gravitational lensing, a key prediction of general relativity, is a cornerstone of modern cosmology. In the current decade, the field is undergoing a major transformation driven by next-generation observatories such as the James Webb Space Telescope (JWST), the Euclid mission, and the Nancy Grace Roman Space Telescope (Roman). These facilities are enabling unprecedented measurements of the distribution of dark and luminous matter across cosmic time, from galaxy scales to the large-scale structure of the Universe. At the same time, the increasing data volume and precision introduce new challenges in shear measurement, modeling, and systematic control, requiring advanced statistical and computational approaches.

This Special Issue aims to present and disseminate the most recent advances in gravitational lensing in the era of JWST, Euclid, and upcoming surveys like Roman. We consider contributions addressing theoretical developments, observational analyses, simulations, and methodological innovations in both weak and strong lensing, with applications to cosmology, dark matter, and galaxy evolution.

Topics of interest for publication include, but are not limited to, the following:

• Weak gravitational lensing: shear measurement, calibration, and systematics;
• Cosmic shear and cosmological parameter inference;
• Strong lensing: time delays, lens modeling, and substructure;
• Dark matter mapping from galaxy to large-scale structure;
• Galaxy–galaxy lensing and halo studies;
• Multi-probe analyses (e.g., CMB lensing and clustering);
• Machine learning models and simulations for lensing.

Dr. Diana Scognamiglio
Guest Editor

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