Eur. Phys. J. C (2017) 77: 29
https://doi.org/10.1140/epjc/s10052-016-4590-y

Regular Article - Theoretical Physics

Constraints on reconstructed dark energy model from SN Ia and BAO/CMB observations

¹ Manipal Centre for Natural Sciences, Manipal University, Manipal, 576104, India
² Department of Physics, Visva-Bharati, Santiniketan, 731235, India
³ Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima, 960-1296, Japan

^* e-mail: abdulla.mamon@manipal.edu
^** e-mail: abdullaalmamon.rs@visvab-harati.ac.in

Received: 8 August 2016
Accepted: 26 December 2016
Published online: 13 January 2017

Abstract

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 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 IaBAO/CMB dataset, we have also reconstructed the scalar potential from the parametrized X(z). The relevant potential is found, a polynomial in . From our analysis, it has been found that the present model favors the standard CDM model within confidence level.