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Sub percent constraints on cosmological temperature evolution

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Figure

TABLE I. Measurements of the CMB taken from the literature, derived from the SZ effect towards galaxy clusters, and fromCMB-photon induced rotational excitation of CO, Cfrom SZ studies we show theused and is different from unity only in cases of combining SZ
TABLE II. Joint constraints on the βthrough the combination of different constraints shown in Ta-ble I.represented by the labels listed in the last column of Table I.Individual and joint probably density functions are also plot- parameter, derivedThe first c
FIG. 1. Individual and joint probability density functions for each of the four combinations indicated in Tables II and III.Blue dashed lines show the individual PDFs derived from the different direct constraints on theof Table II have been derived
FIG. 2. Constraints from SN+H(z) on the parameter βrameterising violations of the temperature-redshift relation asT[5] (dotted contours), which comes mainly from the inclu-sion of moreand 95% confidence levels obtained from SN data alone, lightblue contours

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