Study of Gravitational Lensing Constraints on the Cardassian Model Based on the Friedmann Equation

Abstract

The Cardassian Model for the dark energy, dark matter and unified theory, which have usually invoked as the mostplausible way to explain the recent observational result, have been studied. In this paper we mainly focus our attentionto investigate some observational consequences of a flat, matter dominated and accelerating scenario, on the constraints,the parameters n and q which fully characterize the Cardassian Model. The dependence of the acceleration red-shift thatis the red-shift at which the Universe begins to accelerate, with the parameters n and q is briefly discussed. When weconsider q = 1 our case 2.1 converges to the case of Cardassian model for the dark energy by S. Sen44. Moreover whenwe consider ?r0, the density parameter for radiation, is zero then our case 2.1 converges to the case of Cardassian modelfor dark matter by A., Dev20, as a special case.