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The Impact of Cooling and Preheating on the Sunyaev-Zeldovich Effect
journal contribution
posted on 2023-06-08, 09:33 authored by Antonio C da Silva, Scott T Kay, Andrew Liddle, Peter ThomasPeter Thomas, Frazer R Pearce, Domingos BarbosaWe use hydrodynamical simulations to assess the impact of radiative cooling and ``preheating'' on predictions for the Sunyaev-Zeldovich (SZ) effect. Cooling significantly reduces both the mean SZ signal and its angular power spectrum, while preheating can increase the mean distortion while leaving the angular power spectrum below that found in a simulation without heating or cooling. We study the relative contribution from high- and low-density gas, and we find that in the cooling model about 60% of the mean thermal distortion arises from low-overdensity gas. We find that halos dominate the thermal SZ power spectrum in all models, while in the cooling simulation the kinetic SZ power spectrum originates predominantly in lower overdensity gas.
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- Published
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- Published version
Journal
Astrophysical Journal LettersISSN
2041-8205External DOI
Issue
1Volume
561Page range
15-18Department affiliated with
- Physics and Astronomy Publications
Notes
da Silva was a postgraduate student and Thomas a co-supervisor. Thomas helped to design the simualtions and the analysis technique. He also helped to write the paper. (37 citations)Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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