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

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

Abdulla Al Mamon
(
- Manipal U. and
- Visva Bharati U.
)
,
Kazuharu Bamba
(
- Fukushima U.
)
,
Sudipta Das
(
- Visva Bharati U.
)

Jul 22, 2016

9 pages

Published in:

Eur.Phys.J.C 77 (2017) 1, 29

Published: Jan 13, 2017

e-Print:

1607.06631 [gr-qc]

DOI:

10.1140/epjc/s10052-016-4590-y

View in:

ADS Abstract Service

reference search47 citations

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Abstract: (Springer)

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

\phi

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

\phi

. From our analysis, it has been found that the present model favors the standard

\Lambda

CDM model within

1\sigma

confidence level.

Note:

Revised version, References added, Accepted for publication in European Physical Journal C

dark energy: density
potential: scalar
field theory: scalar
cosmic background radiation
deceleration
equation of state
dark matter
supernova
cosmological model
baryon: oscillation: acoustic

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