Detalles de publicación

PP 015072

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

I. de Martino (1), R. Génova-Santos (2), F. Atrio-Barandela (1), H. Ebeling (3), A. Kashlinsky (4), D. Kocevski (5), C.J.A.P. Martins (6,7)
(1) Física Teórica, Universidad de Salamanca, 37008 Salamanca, Spain (2) Instituto de Astrofísica de Canarias, 38200 La Laguna, Spain (3) Institute for Astronomy, University of Hawaii, Honolulu (4) NASA Goddard Space Flight Center and SSAI, Observational Cosmology Lab (5) Chemistry-Physics Building, University of Kentucky, Lexington, KY 40508 USA (6) Centro de Astrofísica da Universidade do Porto, Rua das Estrelas (7) Instituto de Astrofísica e Ciências do Espa¸co, CAUP, Rua das Estrela
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 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)=T0(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, that we quantify it to be |δα|≤0.02 and with the same sign than the measured value of α, 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.

 
Aceptado para publicación en ApJ | Enviado el 2015-07-01 | Proyecto P/301203