Finding gravitational lenses using transfer learning

Gianluca Sasanelli (2024)

 

Abstract

This thesis studies ULISSE’s (Doorenbos+2022) performance in the specific task of identifying strong gravitational lensed galaxies. Strong Gravitational lensing (SGL) consists in the deflection of light rays propagating from a distant source by the gravitational field of a massive object (e.g, galaxy or cluster), creating multiple images, arcs, and rings around the deflector (also named “lens”). The scientific potential of this phenomenon is important for three main reasons: Firstly, strong lensing can magnify distant sources, hence allowing the observation of objects that otherwise would have been too small to be resolved.

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