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Science Visitor and Colloquium Program
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Astrophysics Luncheon Seminar

Testing the Standard Cosmological Model with the Dark Energy Survey
Presented by Jessi Muir
Stanford University

Monday, May 13, 2019
12:00 noon in 169-336

The Dark Energy Survey (DES) is a photometric galaxy survey which, using measurements of distortions to galaxy shapes from weak gravitational lensing and other observables, we can use to test the validity of our standard cosmological model, Lambda-CDM. In my talk, I will give an overview of how we obtain cosmological constraints from DES weak lensing and galaxy clustering measurements, and how we approach extending that analysis to models beyond Lambda-CDM. As a specific example, I will motivate and discuss my ongoing analysis using a "growth-geometry split" parameterization to compare constraints from structure growth and expansion history, and thus to perform a consistency test of our standard cosmological model.

JPL Contact: Agnes Ferte

SVCP Astrophysics

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