Cosmic acceleration and the change of the Hubble parameter

TL;DR

This paper introduces a new cosmological model explaining the universe's accelerating expansion without dark energy, using exact solutions that show a natural transition from deceleration to acceleration.

Contribution

It presents a novel model with exact solutions demonstrating that cosmic acceleration can occur intrinsically, without requiring dark energy.

Findings

Derived de Sitter vacuum solution

Obtained exact dust-filled universe solution

Proved acceleration transition is intrinsic to the universe

Abstract

A new model of accelerating expansion of the universe is presented. A de Sitter solution in vacuum and a exact solution with the dust mater source are obtained. A new explanation of the acceleration of the cosmic expansion is given. In is proved that the changing of the expansion from decelerating to accelerating is an intrinsic property of the universe without need of dark energy.