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

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• 作者：Abdulla Al Mamon ; Kazuharu Bamba ; Sudipta Das
• 刊名：The European Physical Journal C
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：77
• 期：1
• 全文大小：820KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Elementary Particles, Quantum Field Theory; Nuclear Physics, Heavy Ions, Hadrons; Quantum Field Theories, String Theory; Measurement Science and Instrumentation; Astronomy, Astrophysics and Cosmology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1434-6052
• 卷排序：77

文摘

The motivation of the present work is to reconstruct a dark energy model through the dimensionless dark energy functionX(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.