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Session: Extragalactic Astronomy and Astrophysics

Name: Dr. Georgios Vernardos (City University of New York (CUNY))
Coauthors: No coauthors were included.
Type: Oral
Title: Gravitational lensing in the era of big surveys: current status and challenges
Abstract:

Gravitational lensing of galaxies is a field with major and timely scientific applications: measuring cosmological parameters, testing dark matter and galaxy evolution models, measuring the IMF at cosmological distances, and zooming-in on the heart of quasars, to name a few. The rate of discovery of new galaxy scale lenses has been almost exponential in the last few years. All-sky surveys such as Euclid and LSST – both starting operations in 2023 - are expected not only to increase the sample size from hundreds to tens of thousands but also to provide pristine high-quality data to perform ground-breaking measurements with. This will come at the cost of extending current image and time-series processing techniques to handle this surge of data and understanding their systematics. Inevitably, Artificial Intelligence is a promising path to achieve this. In this presentation, I will review the current state of the field of galaxy-galaxy lensing from discovery to measurement of target properties. Then, I will present the challenges that need to be met in order to maximize the scientific outcomes in the context of Euclid, LSST and beyond.