Event Description
Title: Clusters, Lensing, and Dark Matter Substructure Simulation
Graduate Student: Justin Bird
Abstract: Over the last two decades, gravitational lensing has served as one of the cornerstones in the development of our standard model of cosmology and extragalactic astronomy. Given the importance of accurately measuring the mass, shape, and substructure of individual galactic clusters, and given the enormous expense of long exposure observation, it is vital to produce high-resolution maps of substructure within individual clusters. In this paper, a second-order gravitational flexion reconstruction code is presented as a python module GalFlex. The module has complete integration into the current first-order galaxy simulation toolkit GalSim, part of the GREAT3 collaboration. This second-order field would allow a more accurate mass reconstruction pipeline for groups to test their lensing analysis techniques.
Advisor: Dr. David Goldberg
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