Abstract Details
| Name: Avinash Singh Affiliation: IISER Mohali Conference ID: ASI2018_1461 Title : Perturbation in Tachyon Dark Energy and it's Effect on Matter Clustering Authors and Co-Authors : H. K. Jassal Indian Institute of Science Eduction and Research, Mohali Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : In search of alternative of cosmological constant model of dark energy we study a non-canonical scalar field model namely the tachyon dark energy model. We first put constraints on the parameters with new data of Supernova Type Ia (union 2.1 data) observational, baryon acoustic oscillation (BAO data) pick measurement and direct measurement of Hubble parameter H(z). We also study the structure formation under this model using linear perturbation theory. We look for the effect of dark energy inhomogeneities on matter clustering comparing it with homogeneous and cosmological constant model. We found that although the order of clustering of dark energy for this model is negligible at short scales, like the scale of a galaxy and galaxy cluster, it is significant at large scales. |