Large-scale structure formation in cosmology with classical and tachyonic scalar fields
Astrophysics
2015-05-13 v2
Abstract
The evolution of scalar perturbations is studied for 2-component (non-relativistic matter and dark energy) cosmological models at the linear and non-linear stages. The dark energy is assumed to be the scalar field with either classical or tachyonic Lagrangian and constant equation-of-state parameter w. The fields and potentials were reconstructed for the set of cosmological parameters derived from observations. The comparison of the calculated within these models and experimental large-scale structure characteristics is made. It is shown that for w=const such analysis can't remove the existing degeneracy of the dark energy models.
Cite
@article{arxiv.0809.3349,
title = {Large-scale structure formation in cosmology with classical and tachyonic scalar fields},
author = {O. Sergijenko and Yu. Kulinich and B. Novosyadlyj and V. Pelykh},
journal= {arXiv preprint arXiv:0809.3349},
year = {2015}
}
Comments
15 pages, 5 figures, text corrected, references added, accepted by Kinematics and Physics of Celestial Bodies