Abstract Details
| Name: Archana Sangwan Affiliation: PhD Scholar Conference ID: ASI2016_792 Title : Scalar field dark energy and current observations Authors and Co-Authors : H. K. Jassal Assistant Professor Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : The universe is undergoing accelerated expansion and a large number of models are proposed to explain it. These models include the cosmological constant model and models based on scalar fields. We analyse parameters of canonical scalar field models (quintessence) as well as noncanonical scalar field models, in particular the tachyon model and present observational constraints on their parameters. The different observations used are the type Ia supernovae data, the baryonic acoustic oscillations(BAO) data and direct measurements of hubble parameter H(z). The range of parameters of these models is strongly constrained by present observations. The allowed variation of the density of dark energy also allows us to constrain the shape of potentials, both canonical and noncanonical, which are consistent with current observations. |