Manuscript Number : IJSRST196645
Time Dependence of Various Cosmological Parameters in the Framework of Kaluza-Klein Space-Time
Authors(3) :-Sudipto Roy, Anirban Sarkar, Pritha Ghosh A theoretical model, regarding the time dependence of several cosmological parameters, has been constructed in the present study, in the framework of Kaluza-Klein theory, using its field equations for a spatially flat metric. Time dependent empirical expressions of the cosmological constant and the equation of state (EoS) parameter have been substituted into the field equations to determine the time dependence of various cosmological parameters. Time variations of these parameters have been shown graphically. The cosmological features obtained from this model are found to be in agreement with the observed characteristics of the accelerating universe. Interestingly, the signature flipping of the deceleration parameter, from positive to negative, is predicted by this model, indicating a transformation of the universe from a state of decelerated expansion to accelerated expansion, as obtained from astrophysical observations. Time dependence of the gravitational constant (G), energy density (?), cosmological constant (?) and the EoS parameter (?) have been determined and depicted graphically in the present study.
Sudipto Roy General Theory of Relativity, Kaluza-Klein Space-time, Cosmological Parameters, Dark Energy, Cosmic Acceleration, Gravitational Constant. Publication Details
Published in : Volume 6 | Issue 6 | November-December 2019 Article Preview
Department of Physics, St. Xavier's College, Kolkata, West Bengal, India
Anirban Sarkar
Post Graduate Student of Physics (2017-2019), St. Xavier's College, Kolkata, India
Pritha Ghosh
Post Graduate Student of Physics (2017-2019), St. Xavier's College, Kolkata, India
Date of Publication : 2019-12-30
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 211-220
Manuscript Number : IJSRST196645
Publisher : Technoscience Academy
Journal URL : https://ijsrst.com/IJSRST196645
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