Vol. 7 No. 2 (2015), SECTION A: EXACT SCIENCES
Vol. 7 No. 2 (2015)

Age of the universe and the energy density of radiation

SECTION A: EXACT SCIENCES
Published 2015-12-30
Antonina Calahorrano
Universidad San Francisco de Quito
Carlos A. Marín
Universidad San Francisco de Quito
Volumen 7 - Número 1
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Keywords

general relativity
cosmology
Einstein
Friedmann
Lemaitre
redshift

How to Cite

Calahorrano, A., & Marín, C. A. (2015). Age of the universe and the energy density of radiation. ACI Avances En Ciencias E Ingenierías, 7(2). https://doi.org/10.18272/aci.v7i2.247
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Abstract

From the mathematical expression relating the redshift parameter with time and the cosmological densities of matter, radiation and vacuum in the Lemaitre model, we have derived an equation for the age of the universe at present time taking into account the contribution of the radiation energy density (that generally is neglected in the calculations). Additionally we calculate the value of the redshift parameter in the transition age when matter and radiation decouple.

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Copyright (c) 2015 Antonina Calahorrano, Carlos A. Marín