2016/07/31 by Abdulla Al Mamon, Kazuharu Bamba, Sudipta Das · 69 citations
Computer Science · Physics and Astronomy · #Baryon acoustic oscillations #Computational Physics and Python Applications #Cosmic microwave background #Cosmology and Gravitation Theories #Dark energy #Dark matter #Deceleration parameter #Dimensionless quantity #Equation of state #Gamma-ray bursts and supernovae #Scalar field #Supernova #astro-ph.CO #gr-qc
paper · pdf · doi:10.1140/epjc/s10052-016-4590-y
published in The European Physical Journal C 77(1) (Springer Science+Business Media) · Revised version, References added, Accepted for publication in European Physical Journal C
openalex created_date 2016/08/23 · arxiv created 2016/12/27 · openalex publication_date 2017/01/01 · arxiv updated 2017/02/01 · openalex updated_date 2026/08/06
The motivation of the present work is to reconstruct a dark energy model through the dimensionless dark energy function X(z), which is the dark energy density in units of its present value. In this paper, we have shown that a scalar field φ having a phenomenologically chosen X(z) can give rise to a transition from a decelerated to an accelerated phase of expansion for the universe. We have examined the possibility of constraining various cosmological parameters (such as the deceleration parameter and the effective equation of state parameter) by comparing our theoretical model with the latest Type Ia Supernova (SN Ia), Baryon Acoustic Oscillations (BAO) and Cosmic Microwave Background (CMB) radiation observations. Using the joint analysis of the SN Ia + BAO/CMB dataset, we have also reconstructed the scalar potential from the parametrized X(z). The relevant potential is found, a polynomial in φ . From our analysis, it has been found that the present model favors the standard Λ CDM model within 1σ confidence level.