Test of the cosmic evolution using Gaussian processes

Understand

Much focus was on the possible slowing down of cosmic acceleration under the dark energy parametrization.

• In the present paper, we investigate this subject using the Gaussian processes (GP), without resorting to a particular template of dark energy.
• The reconstruction is carried out by abundant data including luminosity distance from Union2, Union2.1 compilation and gamma-ray burst, and dynamical Hubble parameter.
• It suggests that slowing down of cosmic acceleration cannot be presented within 95\% C.L., in considering the influence of spatial curvature and Hubble constant.