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The Impact of Cooling and Preheating on the Sunyaev-Zeldovich Effect

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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 Barbosa
We 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astrophysical Journal Letters

ISSN

2041-8205

Issue

1

Volume

561

Page range

15-18

Department 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

2012-02-06

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2016-11-10

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