A flat FLRW model with dynamical A as function of matter and geometry
Document Type
Article
Publication Date
11-1-2021
Abstract
We revisit the evolution of the scale factor in a flat FLRW spacetime with a new generalized decay rule for the dynamic Lambda-term under modified theories of gravity. It analyzes certain cosmological parameters and examines their behaviours in this generalized setting which includes several decay laws in the literature. We have also obtained observational constraints on various model parameters and estimated the present values of cosmological parameters {Omega(m0), Omega(Lambda 0), q(0), t(0), omega(0)} and have discussed with various observational results. Finite time past and future singularities in this model are also discussed.
Keywords
FLRW universe, Modified gravity, Dynamical cosmological constant, Observational parameters
Divisions
MathematicalSciences
Funders
Inter-University Centre for Astronomy & Astrophysics (IUCAA) , India [FRGS/1/2019/STG06/UM/02/6]
Publication Title
New Astronomy
Volume
89
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS