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Isravel, Hebzibha
- An Approach of a Fluid Dark Matter with the Classical Λ-Term
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Authors
Affiliations
1 Aerospace Engineering, Karunya University, Tamil Nadu, IN
1 Aerospace Engineering, Karunya University, Tamil Nadu, IN
Source
Journal of Physics & Astronomy, Vol 6, No 3 (2018), Pagination: 1-6Abstract
A cosmological model considering the dark matter as an isotropic fluid and embracing the influence of the cosmological constant in the flat Robertson-Walker metric is investigated. The acquired Equation of state (EOS) parameter confess the omnipresent natural property of the overall matter content in the present cosmos corroborating with the cosmic coincidence problem. It also exhibited its influence on the incidence of the finite singularity in the future called the Big Rip. The cosmic acceleration as a function of the redshift (Z) and the EOS parameter is extrapolated and compared with few coherent models for analysing its correlation.Keywords
Dark Matter, Equation of State, Perfect Fluid Cosmology, Big Rip Singularity, Acceleration Expansion.Full Text
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- Constant-Roll F(R) Gravity Inflation Solution
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Authors
Affiliations
1 Aeronautical Department, Sha-Shib College of Engineering, Bangalore, Karnataka 562104, IN
1 Aeronautical Department, Sha-Shib College of Engineering, Bangalore, Karnataka 562104, IN
Source
Journal of Physics & Astronomy, Vol 7, No 1 (2019), Pagination: 1-4Abstract
In this letter, the issue of flatness in the standard Big Bang model is approached with the different perspective where the inflation theory is framed with the constant-roll model of modified gravity F(R) by addressing the reheating phenomena.Keywords
Inflation, Flatness Problem, Modified F(R) Gravity, Constant Roll Approximation.Full Text
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