Constraining the Temperature Evolution of the Cosmic Microwave Background Using the Sunyaev-Zeldovich Effect with SPT-3G

The adiabatic temperature evolution of the Cosmic Microwave Background (CMB) is a fundamental prediction of the standard model of cosmology. Deviations from adiabatic temperature evolution would leave a characteristic signature in the Sunyaev-Zeldovich Effect (SZE). The SZE is caused by inverse Compton scattering of CMB photons off of hot electrons in galaxy clusters, and if the CMB temperature evolves adiabatically the SZE is independent of redshift. However, deviations from adiabatic temperature evolution lead to a redshift dependence in the SZE. In this talk, I will present results from an ongoing work to look for deviations from adiabatic CMB temperature evolution parameterized as T(z)=(1+z)^(1-α). This work uses maps from SPT-3G, the third-generation camera on the South Pole Telescope, along with previously cataloged galaxy clusters detected by SPT-SZ to obtain new constraints on deviations from α=0, the value predicted by standard cosmology.