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

Mamon, Abdulla Al and Bamba, Kazuharu and Das, Sudipta (2017) Constraints on reconstructed dark energy model from SN Ia and BAO/CMB observations. European Physical Journal C, 77 (1). pp. 29-38. ISSN 14346044

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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 CDM model within 1σ confidence level.

Item Type: Article
Uncontrolled Keywords: dark energy, data analysis
Subjects: Departments at MU > Manipal Centre for Natural Sciences
Depositing User: MCNS Editor
Date Deposited: 19 Aug 2017 07:20
Last Modified: 19 Aug 2017 07:20

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