Dirac Cosmology and the Acceleration of the Contemporary Universe

Details Dirac Cosmology and the Acceleration of the Contemporary Universe Dirac Cosmology and the Acceleration of the Contemporary Universe

2005-08-09

arxiv.org/abs/gr-qc/0508030v1

Class.Quant.Grav. 23 (2006) 3707-3720

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 8 figures

Scientific paper

10.1088/0264-9381/23/11/003

A model is suggested to unify the Einstein GR and Dirac Cosmology. There is one adjusted parameter $b_2$ in our model. After adjusting the parameter $b_2$ in the model by using the supernova data, we have calculated the gravitational constant $\bar G$ and the physical quantities of $a(t)$, $q(t)$ and $\rho_r(t)/ \rho_b(t)$ by using the present day quantities as the initial conditions and found that the equation of state parameter $w_{\theta}$ equals to -0.83, the ratio of the density of the addition creation $\Omega_{\Lambda}=0.8$ and the ratio of the density of the matter including multiplication creation, radiation and normal matter $\Omega_m =0.2$ at present. The results are self-consistent and in good agreement with present knowledge in cosmology. These results suggest that the addition creation and multiplication creation in Dirac cosmology play the role of the dark energy and dark matter.

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