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.