Sub-percent constraints on cosmological temperature evolution

Avgoustidis, A. and Genova-Santos, R.T . and Luzzi, G. and Martins, C.J.A.P. (2016) Sub-percent constraints on cosmological temperature evolution. Physical Review D, 93 (4). 043521/1-043521/8. ISSN 1550-2368

Full text not available from this repository.


The redshift dependence of the cosmic microwave background temperature is one of the key cosmological observables. In the standard cosmological model one has T (z) = T0(1 + z), where T0 is the present-day temperature. Deviations from this behavior would imply the presence of new physics. Here we discuss how the combination of all currently available direct and indirect measurements of T (z) constrains the common phenomenological parametrization T (z) = T0(1 + z)^(1−β) , and obtain the first sub-percent constraint on the temperature growth index 1 − β. Specifically, we find β = (7.6 ± 8.0) × 10^(−3) at the 68.3% confidence level.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number:
Depositing User: Avgoustidis, Anastasios
Date Deposited: 14 Jul 2016 13:05
Last Modified: 04 May 2020 17:37

Actions (Archive Staff Only)

Edit View Edit View