Astrophysics and Cosmology Group

Gravitational Lensing and High Redshift Galaxies


Adi Zitrin

Galaxy Cluster Abell 370 and its famous gravitational arcs, imaged with the Hubble Space Telescope.

Massive galaxy clusters bend light rays from background sources to form magnified, distorted, and multiple arcs. Using this Gravitational Lensing phenomenon, we can map the Dark Matter distribution of the lens, invisible otherwise. Thanks to the magnification power from lensing we can also access increasingly fainter and high-redshift (earlier) galaxies, and study the evolution of the first generation galaxies and the Reionization of the Universe.