Northwestern Events Calendar


Astro Seminar: Chihway Chang: Weak lensing in the Dark Energy Survey and beyond

When: Tuesday, November 9, 2021
4:00 PM - 5:00 PM Central

Where: 1800 Sherman Avenue, 7-600, Evanston, IL 60201 map it

Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students

Contact: Samantha Westlake  

Group: Physics and Astronomy Astrophysics Seminars

Category: Academic


Abstract: In this talk I will first give an update on the DES Y3 cosmology results using two-point functions of weak lensing and galaxy clustering, as well as the mild discrepancy seen between weak lensing and the primary CMB results from Planck. Next I will talk about two main directions we are working on to extract additional information from the cosmic fields to understand this discrepancy — first using more small-scale information (using HOD and cross-correlation of galaxies and tSZ) and second to go beyond two-point statistics (such as peaks and high-order moments). I will end with some outlook towards the next weak lensing survey on the horizon, the Rubin Observatory’s Legacy Survey of Space and Time.

Speaker: Chihway Chang, University of Chicago


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