Title: Constraining the Redshift Dependence of the CMB Temperature using the Sunyaev-Zeldovich Effect
Abstract: Recent data have put powerful constraints on the present temperature of the cosmic microwave background (CMB) radiation, but the standard cosmological temperature-redshift relation, T = T0(1 + z), remains practically unverified. The Sunyaev-Zeldovich (SZ) effect is a promising candidate for placing constraints on T (z), the former exhibiting a slight z dependence for all non-standard models. We discuss the possibility of using ratios of CMB intensity distortions due to the SZ effect at different radio frequencies to determine the correct relation. Mock SZ observations on simulated data for a fiducial ΛCDMcosmology are used in testing how well high-frequency data from the Planck satellite will be able to constrain T (z). For a parameterization of the form T = T0(1+z) , where a = 0 corresponds to the standard relation, we find that we can recover a to an accuracy of 10 at the 95% confidence level.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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