Multi-wavelength studies of strong gravitational lensing phenomena

Abstract

In the past few years, gravitational lensing and, in particular, strong gravitational lensing, has gained great attention from the scientific community. The few strong lensing systems known at the beginning of this century have presently been replaced with hundreds of systems and thousands more will be detected by future surveys with JWST, Euclid and SKA. This work, entitled multi-wavelength studies of strong gravitational lensing phenomena, aims to provide a brief overview on what gravitational lensing is and how gravitational lensing systems are identified and studied in astrophysics, with a particular focus on strong gravitational lensing phenomena. It is composed of four chapters. In the first chapter, we will introduce what gravitational lensing is and how it appears to an observer in its different regimes. In the second chapter, we will focus on strong gravitational lensing phenomena and how they have been classically searched for in the sky exploiting Optical and Radio data. In the third chapter we will focus on the search of strong gravitational lensing using submillimeter photometry, which has changed the paradigm to look for lensing events and has open the door to a new era of discoveries in the field. In the last chapter we will summarise and conclude our review on the topic.