Constraining the redshift evolution of the Cosmic Microwave Background black-body temperature with PLANCK data

Abstract

We constrain the deviation of adiabatic evolution of the Universe using the data on the Cosmic Microwave Background (CMB) temperature anisotropies measured by the {\it Planck} satellite and a sample of 481 X-ray selected clusters with spectroscopically measured redshifts. To avoid antenna beam effects, we bring all the maps to the same resolution. We use a CMB template to subtract the cosmological signal while preserving the Thermal Sunyaev-Zeldovich (TSZ) anisotropies; next, we remove galactic foreground emissions around each cluster and we mask out all known point sources. If the CMB black-body temperature scales with redshift as $T(z)=T_0(1+z{)}^{1-\alpha }$, we constrain deviations of adiabatic evolution to be $\alpha =-0.007\pm 0.013$, consistent with the temperature-redshift relation of the standard cosmological model. This result could suffer from a potential bias $\delta \alpha$ associated with the CMB template, that we quantify it to be $|\delta \alpha |\le 0.02$ and with the same sign than the measured value of $\alpha$, but is free from those biases associated with using TSZ selected clusters; it represents the best constraint to date of the temperature-redshift relation of the Big-Bang model using only CMB data, confirming previous results.

ApJ, in press. Manuscript matches the accepted version: 10 pages, 7 figures, 3 tables

References in corpus (2)

• The Representative XMM-Newton Cluster Structure Survey (REXCESS) of an X-ray Luminosity Selected Galaxy Cluster Sample
• Tests of the CMB temperature-redshift relation, CMB spectral distortions and why adiabatic photon production is hard

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