Strong Lensing by Galaxies
T. Treu (University of California Santa Barbara)
TL;DR
Strong gravitational lensing is a versatile astrophysical tool used to study galaxy mass distribution, universe geometry, and distant faint objects, with recent advances and promising future prospects.
Contribution
This paper reviews fundamental concepts of strong lensing, highlights recent key results, and discusses future opportunities in the field.
Findings
Enhanced understanding of galaxy mass profiles
Constraints on cosmological parameters from lensing
Insights into distant and faint astrophysical objects
Abstract
Strong lensing is a powerful tool to address three major astrophysical issues: understanding the spatial distribution of mass at kpc and sub-kpc scale, where baryons and dark matter interact to shape galaxies as we see them; determining the overall geometry, content, and kinematics of the universe; studying distant galaxies, black holes, and active nuclei that are too small or too faint to be resolved or detected with current instrumentation. After summarizing strong gravitational lensing fundamentals, I present a selection of recent important results. I conclude by discussing the exciting prospects of strong gravitational lensing in the next decade.
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