Bibcode
de Martino, I.; Génova-Santos, R.; Atrio-Barandela, F.; Ebeling, H.; Kashlinsky, A.; Kocevski, D.; Martins, C. J. A. P.
Bibliographical reference
The Astrophysical Journal, Volume 808, Issue 2, article id. 128, 10 pp. (2015).
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8
2015
Journal
Citations
27
Refereed citations
26
Description
We constrain the deviation of adiabatic evolution of the universe using
the data on the cosmic microwave background (CMB) temperature
anisotropies measured by the Planck satellite and a sample of 481 X-ray
selected clusters with spectroscopically measured redshifts. To avoid
antenna beam effects, we bring all of 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 blackbody temperature scales
with redshift as T{(z)={T}0(1+z)}1-α , we
constrain deviations of adiabatic evolution to be α = ‑0.007
± 0.013, consistent with the temperature-redshift relation of the
standard cosmological model. This result could suffer from a potential
bias δα associated with the CMB template. We quantify it to
be | δ α | ≤slant 0.02, with the same sign as the
measured value of α. Our result 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.
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