2021ApJ...922..136L

Query : 2021ApJ...922..136L

2021ApJ...922..136L - Astrophys. J., 922, 136-136 (2021/December-1)

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

LI Y., HINCKS A.D., AMODEO S., BATTISTELLI E.S., BOND J.R., CALABRESE E., CHOI S.K., DEVLIN M.J., DUNKLEY J., FERRARO S., GLUSCEVIC V., GUAN Y., HALPERN M., HILTON M., HLOZEK R., MARRIAGE T.A., McMAHON J., MOODLEY K., NAESS S., NATI F., NIEMACK M.D., ORLOWSKI-SCHERER J., PAGE L., PARTRIDGE B., SALATINO M., SCHAAN E., SCHILLACI A., SEHGAL N., SIFON C., STAGGS S.T., VAN ENGELEN A., WOLLACK E.J. and XU Z.

Abstract (from CDS):

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.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Cosmology - Cosmic microwave background radiation - Sunyaev-Zeldovich effect - Galaxy clusters

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
2 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0

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