Abstract

Testing chameleon gravity models using DES weak lensing and XCS X-ray profiles.
Dark Energy and Modified gravity
Carlos Vergara
Wilcox (Portsmouth), Romer (Sussex), Bacon (Portsmouth), Nichol (Portsmouth)
University of Sussex
If it exists, a fifth force would influence the hot X-ray emitting gas filling the potential wells of galaxy clusters. However, it would not influence the clusters weak lensing signal. Therefore, by comparing X-ray and weak lensing profiles, one can place upper limits on the strength of a fifth force. Here we extend the techniques developed in Wilcox et al. 2015 & 2016 by applying them to the stacked profiles of hundreds of clusters detected by both the Dark Energy Survey and the XMM Cluster Survey.

Schedule

13:30 - 15:00
14:50
Tuesday
BS - Lecture Theatre A25 (121)

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