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 α =0.017-0.032+0.029, where T(z)=T0(1+z)1-α. 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 weff=-0.998-0.010+0.008.

Li, Y., Hincks, A., Amodeo, S., Battistelli, E., Bond, J., Calabrese, E., et al. (2021). Constraining Cosmic Microwave Background Temperature Evolution with Sunyaev-Zel'Dovich Galaxy Clusters from the Atacama Cosmology Telescope. THE ASTROPHYSICAL JOURNAL, 922(2) [10.3847/1538-4357/ac26b6].

Constraining Cosmic Microwave Background Temperature Evolution with Sunyaev-Zel'Dovich Galaxy Clusters from the Atacama Cosmology Telescope

Nati F.;
2021

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 α =0.017-0.032+0.029, where T(z)=T0(1+z)1-α. 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 weff=-0.998-0.010+0.008.
Articolo in rivista - Articolo scientifico
Cosmology, SZ Effect;
English
Li, Y., Hincks, A., Amodeo, S., Battistelli, E., Bond, J., Calabrese, E., et al. (2021). Constraining Cosmic Microwave Background Temperature Evolution with Sunyaev-Zel'Dovich Galaxy Clusters from the Atacama Cosmology Telescope. THE ASTROPHYSICAL JOURNAL, 922(2) [10.3847/1538-4357/ac26b6].
Li, Y; Hincks, A; Amodeo, S; Battistelli, E; Bond, J; Calabrese, E; Choi, S; Devlin, M; Dunkley, J; Ferraro, S; Gluscevic, V; Guan, Y; Halpern, M; Hilton, M; Hlozek, R; Marriage, T; Mcmahon, J; Moodley, K; Naess, S; Nati, F; Niemack, M; Orlowski-Scherer, J; Page, L; Partridge, B; Salatino, M; Schaan, E; Schillaci, A; Sehgal, N; Sifon, C; Staggs, S; Van Engelen, A; Wollack, E; Xu, Z
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/369948
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
Social impact