CCAPP Seminar: "Measuring weak lensing magnification with the Fundamental Plane" Jenna Freudenburg (OSU Physics)

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July 24, 2018
11:30AM - 12:30PM
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PRB 4138

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Add to Calendar 2018-07-24 11:30:00 2018-07-24 12:30:00 CCAPP Seminar: "Measuring weak lensing magnification with the Fundamental Plane" Jenna Freudenburg (OSU Physics) I present a strategy for measuring weak lensing magnification using the fundamental plane in a DES-like dataset. Weak lensing has proved a powerful probe of cosmology, but shear measurements are sensitive to a number of significant systematic effects. To make the most of future cosmological surveys, new tools are needed to improve precision and constrain these systematics. Magnification, historically the neglected little sibling of shear in the weak lensing family, provides a promising way forward. I propose a method that takes advantage of scaling relations among elliptical galaxies to provide a zero-point for size measurements and discuss the challenge of incorporating magnification into future cosmology analyses. PRB 4138 Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public
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I present a strategy for measuring weak lensing magnification using the fundamental plane in a DES-like dataset. Weak lensing has proved a powerful probe of cosmology, but shear measurements are sensitive to a number of significant systematic effects. To make the most of future cosmological surveys, new tools are needed to improve precision and constrain these systematics. Magnification, historically the neglected little sibling of shear in the weak lensing family, provides a promising way forward. I propose a method that takes advantage of scaling relations among elliptical galaxies to provide a zero-point for size measurements and discuss the challenge of incorporating magnification into future cosmology analyses.

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