2014MNRAS.440.2610S

Query : 2014MNRAS.440.2610S

2014MNRAS.440.2610S - Mon. Not. R. Astron. Soc., 440, 2610-2615 (2014/May-3)

Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev-Zel'dovich effect with the South Pole Telescope.

SARO A., LIU J., MOHR J.J., AIRD K.A., ASHBY M.L.N., BAYLISS M., BENSON B.A., BLEEM L.E., BOCQUET S., BRODWIN M., CARLSTROM J.E., CHANG C.L., CHIU I., CHO H.M., CLOCCHIATTI A., CRAWFORD T.M., CRITES A.T., DE HAAN T., DESAI S., DIETRICH J.P., DOBBS M.A., DOLAG K., DUDLEY J.P., FOLEY R.J., GANGKOFNER D., GEORGE E.M., GLADDERS M.D., GONZALEZ A.H., HALVERSON N.W., HENNIG C., HLAVACEK-LARRONDO J., HOLZAPFEL W.L., HRUBES J.D., JONES C., KEISLER R., LEE A.T., LEITCH E.M., LUEKER M., LUONG-VAN D., MANTZ A., MARRONE D.P., McDONALD M., McMAHON J.J., MEHL J., MEYER S.S., MOCANU L., MONTROY T.E., MURRAY S.S., NURGALIEV D., PADIN S., PATEJ A., PRYKE C., REICHARDT C.L., REST A., RUEL J., RUHL J.E., SALIWANCHIK B.R., SAYRE J.T., SCHAFFER K.K., SHIROKOFF E., SPIELER H.G., STALDER B., STANISZEWSKI Z., STARK A.A., STORY K., VAN ENGELEN A., VANDERLINDE K., VIEIRA J.D., VIKHLININ A., WILLIAMSON R., ZAHN O. and ZENTENO A.

Abstract (from CDS):

The adiabatic evolution of the temperature of the cosmic microwave background (CMB) is a key prediction of standard cosmology. We study deviations from the expected adiabatic evolution of the CMB temperature of the form T(z) = T0(1 + z)1 - α using measurements of the spectrum of the Sunyaev-Zel'dovich effect with the South Pole Telescope (SPT). We present a method for using the ratio of the Sunyaev-Zel'dovich signal measured at 95 and 150GHz in the SPT data to constrain the temperature of the CMB. We demonstrate that this approach provides unbiased results using mock observations of clusters from a new set of hydrodynamical simulations. We apply this method to a sample of 158 SPT-selected clusters, spanning the redshift range 0.05 < z < 1.35, and measure α= 0.017^+0.030_-0.028, consistent with the standard model prediction of α = 0. In combination with other published results, we find α = 0.005±0.012, an improvement of ∼ 10 percent over published constraints. This measurement also provides a strong constraint on the effective equation of state in models of decaying dark energy weff = -0.994±0.010.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: clusters: general - cosmic background radiation - cosmology: observations - cosmology: theory - submillimetre: general

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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