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Constraining cosmic microwave background temperature evolution with Sunyaev–Zel'Dovich galaxy clusters from the Atacama Cosmology Telescope

Li, Yunyang, Hincks, Adam D., Amodeo, Stefania, Battistelli, Elia S., Bond, J. Richard, Calabrese, Erminia ORCID: https://orcid.org/0000-0003-0837-0068, Choi, Steve K., Devlin, Mark J., Dunkley, Jo, Ferraro, Simone, Gluscevic, Vera, Guan, Yilun, Halpern, Mark, Hilton, Matt, Hlozek, Renee, Marriage, Tobias A., McMahon, Jeff, Moodley, Kavilan, Naess, Sigurd, Nati, Federico, Niemack, Michael D., Orlowski-Scherer, John, Page, Lyman, Partridge, Bruce, Salatino, Maria, Schaan, Emmanuel, Schillaci, Alessandro, Sehgal, Neelima, Sifón, Cristóbal, Staggs, Suzanne T., van Engelen, Alexander, Wollack, Edward J. and Xu, Zhilei 2021. Constraining cosmic microwave background temperature evolution with Sunyaev–Zel'Dovich galaxy clusters from the Atacama Cosmology Telescope. Astrophysical Journal 922 (2) , 136. 10.3847/1538-4357/ac26b6

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Abstract

The Sunyaev–Zel'dovich (SZ) effect introduces a specific distortion of the blackbody spectrum of the cosmic microwave background (CMB) radiation when it scatters off hot gas in clusters of galaxies. The frequency dependence of the distortion is only independent of the cluster redshift when the evolution of the CMB radiation is adiabatic. Using 370 clusters within the redshift range 0.07 ≲ z ≲ 1.4 from the largest SZ-selected cluster sample to date from the Atacama Cosmology Telescope, we provide new constraints on the deviation of CMB temperature evolution from the standard model $\alpha ={0.017}_{-0.032}^{+0.029}$, where $T(z)={T}_{0}{\left(1+z\right)}^{1-\alpha }$. This result is consistent with no deviation from the standard adiabatic model. Combining it with previous, independent data sets we obtain a joint constraint of α = −0.001 ± 0.012. Attributing deviation from adiabaticity to the decay of dark energy, this result constrains its effective equation of state ${w}_{\mathrm{eff}}=-{0.998}_{-0.010}^{+0.008}$.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Astronomical Society
ISSN: 0004-637X
Date of First Compliant Deposit: 9 March 2022
Date of Acceptance: 13 November 2021
Last Modified: 15 Nov 2023 20:59
URI: https://orca.cardiff.ac.uk/id/eprint/148175

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