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Developing forward-modeling software for galaxy cluster abundance cosmology analysis

Published onJun 01, 2020
Developing forward-modeling software for galaxy cluster abundance cosmology analysis

The abundance of galaxy clusters is a sensitive probe of cosmological parameters, and a fundamental goal of wide-field cosmic survey programs such as the Dark Energy Survey (DES). We develop a Cluster Cosmology modeling pipeline that simultaneously predicts cluster number counts and cluster angular shear profiles, given a set of cosmology parameters, scaling relations, and cluster sample's richness and redshift ranges. The pipeline is developed in C++ and is optimized for speed to handle multi-dimensional integrations, which are necessary for incorporating various systematic effects. We set up unit testing code, a physics validation module, as well as developing parallelizing mechanisms that are necessary for applying the modeling results in a MCMC parameter constraining procedure. The analysis pipeline is currently tested on hydrodynamic and cosmological simulation suites.

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