APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: James Chan (ASIAA)
Title: Searching for Strong Lenses to Probe Dark Matter Substructures
Date (JST): Thu, Nov 26, 2015, 11:00 - 12:00
Place: Seminar Room A
Related File: 1580.pdf
Abstract: Strong gravitationally lensed quasars provide powerful means to study galaxy structures/substructures. Current and upcoming imaging surveys will contain thousands of new lensed quasars, augmenting the existing sample by at least two orders of magnitude. We have built a new lens hunter - CHITAH - to search for new lensed quasars in Hyper Suprime-Cam (HSC) survey. CHITAH has identified a few lensed quasar candidates. We have also setup a database to track all new lens candidates in the future. Through flux measurements of multiple lensed quasar images, we can understand the size scale and the abundance of substructures of dark matter, and further compare different dark matter models: cold dark matter (CDM) and wave-like dark matter (�DM).