Classification of 5D Chaplygin gas models

Abstract

In this study, we mainly classify some Chaplygin gas unified dark energy models in a five-dimensional (5D) cosmology. It is known that the background evolution for the Chaplygin gas models is equivalent to that for the dark energy interacting with the dark matter. Here, we assume a space-time governed by the five-dimensional Kaluza-Klein framework in order to rewrite energy densities and pressures of some well-known Chaplygin gas proposals. These new formulations can be taken into account to get original cosmological conclusions in further studies.