Linear and non-linear perturbations in dark energy models
نویسندگان
چکیده
منابع مشابه
Dark Energy and Non–linear Perturbations
One of the most important goals of contemporary cosmology is to unreveal the properties of dark energy. This energy form is thought to be responsible for the observed accelerating expansion of the present day universe. There are several methods used to study the properties of dark energy. The important ones make use of the anisotropies in the Cosmic Microwave Background Radiation (CMB), the evo...
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The coincidence problem. Perhaps the most surprising observation in modern cosmology is that the expansion of the universe has apparently started to accelerate in the recent past, at a redshift of probably less than one. This phenomenon has usually been interpreted in the context of a homogeneous and isotropic model of the universe. The acceleration can then be accommodated only by modifying gr...
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چکیده ندارد.
15 صفحه اولCosmological Linear Perturbations in the Models of Dark Energy and Modified Gravity
The quasi-static solutions of the matter density perturbation in various dark energy models and modified gravity models have been investigated in numerous papers. However, the oscillating solutions in those models have not been investigated enough so far. In this paper, we review the behavior of the oscillating solutions, which have a possibility to unveil the difference between the models of t...
متن کاملNon linear predictions from linear theories in models with Dark Energy
We study the cluster mass function and its evolution in different models with Dark Energy arising from a self–interacting scalar field, with Ratra–Peebles and SUGRA potentials. Computations are based on a Press & Schechter approximation. The mass functions we obtain are compared with results holding for open models or models with Dark Energy due to a cosmological constant. Evolution results, in...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2016
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2016/11/010