INTER-UNIVERSITY CENTRE FOR ASTRONOMY AND ASTROPHYSICS
(An Autonomous Institution of the University Grants Commission)
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SEMINAR
Mr. Pranjal Singh |
University of Arizona, Tucson, United States |
Weak lensing without shape noise |
Weak lensing allows us to probe the dark structures of the Universe by measuring coherent distortions in galaxy shapes. However, being a statistical measurement weak lensing requires millions of galaxies to get meaningful constraints on cosmological parameters. Building up such a large ensemble poses several challenges relating to data acquisition and systematics modeling. Kinematic lensing (KL) is a new technique that requires O(10^2) fewer galaxies than traditional measurements and has the potential to significantly boost the measurable lensing signal. KL utilizes the Tully-Fisher relation along with galaxy kinematics inferred from spectroscopy to estimate shear. I will describe our KL measurement pipeline and present first results from a simulated analysis. I will also demonstrate the robustness of our technique and requirements for a future observational program. |
Online Seminar |
April 21, 2022, 16:00 hrs. |