• M. Langa

      Articles written in Journal of Astrophysics and Astronomy

    • Relativistic Dynamics in a Matter-Dominated Friedmann Universe

      M. Langa D. S. Wamalwa C. Mito

      More Details Abstract Fulltext PDF

      The energy density of the universe is estimated to be composed of 68% dark energy. Dark energy is associated with the accelerated expansion of the universe. In this work, we consider the evolution of the number density $n(z)$ and light intensity $I(z)$ of galaxies with redshift $z$ for a matter-dominated Friedmann universe in the presence of dark energy and compare the results with a matter-dominated Friedmann universe without dark energy effects. Computational results of $n(z)$ and $I(z)$ are presented in a suitable form for comparison with future observed dependencies to test the fractal-homogeneous models of open, closed and flat matter-dominated universe. From our results, there was increased structure formation in the universe from z=0 to $z ≈ 1$ when the rate of growth started to slow down. Furthermore, there is reduced structure formation for a universe driven by dark energy as compared to one without dark energy.

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      Posted on January 27, 2016

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