Chandra Follow-up of Dark Energy Survey Clusters Through Year 3
Abstract
Analysis of galaxy clusters can help place constraints on the matter density of the universe and the dark energy equation of state. Cosmological parameters can be constrained through the evolution of the cluster mass function. While cluster mass can be observed using techniques such as weak lensing, many surveys do not have the necessary depth of data to observe mass directly. Stacked weak lensing techniques can be used to ascertain mean observable-mass relations, which themselves have intrinsic scatter distributions. Last year, the Mass Analysis Tool for Chandra (MATCha) was introduced (Hollowood et. al 2018) to analyze galaxy cluster mass proxies and their intrinsic scatter distributions using archival Chandra X-ray data. I will detail several upgrades to the MATCha pipeline, such as techniques for inferring temperature from unclear data and improvements to centering calculations. Finally, I will present MATCha analysis of Dark Energy Survey Year 3 clusters.
- Publication:
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AAS/High Energy Astrophysics Division
- Pub Date:
- March 2019
- Bibcode:
- 2019HEAD...1710718E