Speaker
Description
Galaxy clusters are the largest gravitationally bound objects in the Universe, serving as powerful cosmological probes on the growth of structure on the largest physical scales. The thermal Sunyaev-Zeld'dovich (tSZ) effect is now a well-established technique for probing the intracluster medium (ICM) of galaxy clusters on these scales. Measuring the gas pressure serves as a robust tracer of mean ICM structure, as variations in gas temperature will be counteracted by changes in gas density. The generalized Navarro–Frenk–White (gNFW) model is a strong descriptor of average cluster pressure for a large range in cluster mass and redshift.
We will present our findings on measuring average gNFW pressure profiles for the SPT-SZ cluster sample, containing 516 clusters over a large range in both mass and redshift. We use both SPT-SZ and Planck survey data, constraining cluster pressure from intermediate to high radii. We also explore the average cluster profiles for morphologically different samples, such as cool core, non-cool core, relaxed, and disturbed. Two of the key findings in the work are a strong indication of lower average pressure in the universal pressure profile fit at high radii, and a significant disparity in pressure profiles between the relaxed and disturbed subsamples.
| Would you be interested in presenting a poster if the conference is oversubcribed? | Yes |
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