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Large-scale structure formation in cosmology with classical and tachyonic scalar fields |
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| Authors: | O Sergijenko Yu Kulinich B Novosyadlyj V Pelykh |
| Institution: | (1) Astronomical Observalory, Ivan Franko L’viv National University, vul. Kyryla i Mefodiia 8, L’viv, 79005, Ukraine;(2) Institute of Applied Problems in Mechanics and Mathematics, National Academy of Sciences of Ukraine, vul. Naukova 3-b, L’viv, 79060, Ukraine |
| 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 observational 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. The article is published in the original. |
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