Abstract Details

Name: Abdulla Al Mamon
Affiliation: Manipal Centre for Natural Sciences, Manipal University
Conference ID: ASI2017_1430
Title : Study of parametrized dark energy models with a non-canonical scalar field
Authors and Co-Authors : Sudipta Das, Department of Physics, Visva-Bharati, India
Abstract Type : Poster
Abstract Category : General Relativity and Cosmology
Abstract : In this work, we try to build up a cosmological model using a non-canonical scalar field within the framework of a spatially flat FRW space–time. In this context, we have considered four different parametrizations of the equation of state parameter of the non-canonical scalar field. Under this scenario, analytical solutions for various cosmological parameters have been found out. We have found that the deceleration parameter shows a smooth transition from a positive value to some negative value which indicates that the universe was undergoing an early deceleration followed by late time acceleration which is essential for the structure formation of the universe. With these four parametrizations, the future evolution of the models are also discussed. We have found that one of the models (Generalized Chaplygin gas model) mimics the standard Lambda CDM in the near future, whereas two other models (CPL and JBP) diverge due to future singularity. Finally, we have studied these theoretical models with the latest datasets from SNIa + H (z) + BAO/CMB.