Some Interacting Dark Energy Models
In this paper, we study various cosmological models involving new nonlinear forms of interaction between cold dark matter (DM) and dark energy (DE) assuming that DE is a barotropic fluid. The interactions are nonlinear either due to <inline-formula> <math display="inline"> <...
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doaj-1e5ae87c42014a849577704c8fd25dc82020-11-24T21:47:44ZengMDPI AGSymmetry2073-89942018-11-01101157710.3390/sym10110577sym10110577Some Interacting Dark Energy ModelsMartiros Khurshudyan0Asatur Zh. Khurshudyan1International Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), 634050 Tomsk, RussiaDepartment on Dynamics of Deformable Systems and Coupled Fields, Institute of Mechanics, National Academy of Sciences of Armenia, Yerevan 0019, ArmeniaIn this paper, we study various cosmological models involving new nonlinear forms of interaction between cold dark matter (DM) and dark energy (DE) assuming that DE is a barotropic fluid. The interactions are nonlinear either due to <inline-formula> <math display="inline"> <semantics> <mrow> <mo form="prefix">log</mo> <mo>(</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>e</mi> </mrow> </msub> <mo>/</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>m</mi> </mrow> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> or <inline-formula> <math display="inline"> <semantics> <mrow> <mo form="prefix">log</mo> <mo>(</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>m</mi> </mrow> </msub> <mo>/</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>e</mi> </mrow> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> parameterizations, respectively. The main purpose of this paper is to demonstrate the applicability of the forms of suggested interactions to the problem of modern cosmology known as accelerated expansion of the Universe. Using the differential age of old galaxies expressed in terms of <inline-formula> <math display="inline"> <semantics> <mrow> <mi>H</mi> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> data, the peak position of baryonic acoustic oscillations (known as BAO data), the SN Ia data with strong gravitational lensing data, we obtain the best fit values of the model parameters for each case. Besides, using <inline-formula> <math display="inline"> <semantics> <mrow> <mi>O</mi> <mi>m</mi> </mrow> </semantics> </math> </inline-formula> analysis and <inline-formula> <math display="inline"> <semantics> <msub> <mi>S</mi> <mn>3</mn> </msub> </semantics> </math> </inline-formula> parameter from the statefinder hierarchy analysis, we also demonstrate that the considered models are clearly different from the <inline-formula> <math display="inline"> <semantics> <mi mathvariant="sans-serif">Λ</mi> </semantics> </math> </inline-formula>CDM model. We obtain that the models predict Hubble parameter values consistent to the estimations from gravitational lensing, which probes the expansion out to <inline-formula> <math display="inline"> <semantics> <mrow> <mi>z</mi> <mo>≤</mo> <mn>1.7</mn> </mrow> </semantics> </math> </inline-formula>. We show that, with considered models, we can also explain PLANCK 2015 and PLANCK 2018 experiment results.https://www.mdpi.com/2073-8994/10/11/577accelerated expansiondark energyparameterizationHubble parameter |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Martiros Khurshudyan Asatur Zh. Khurshudyan |
spellingShingle |
Martiros Khurshudyan Asatur Zh. Khurshudyan Some Interacting Dark Energy Models Symmetry accelerated expansion dark energy parameterization Hubble parameter |
author_facet |
Martiros Khurshudyan Asatur Zh. Khurshudyan |
author_sort |
Martiros Khurshudyan |
title |
Some Interacting Dark Energy Models |
title_short |
Some Interacting Dark Energy Models |
title_full |
Some Interacting Dark Energy Models |
title_fullStr |
Some Interacting Dark Energy Models |
title_full_unstemmed |
Some Interacting Dark Energy Models |
title_sort |
some interacting dark energy models |
publisher |
MDPI AG |
series |
Symmetry |
issn |
2073-8994 |
publishDate |
2018-11-01 |
description |
In this paper, we study various cosmological models involving new nonlinear forms of interaction between cold dark matter (DM) and dark energy (DE) assuming that DE is a barotropic fluid. The interactions are nonlinear either due to <inline-formula> <math display="inline"> <semantics> <mrow> <mo form="prefix">log</mo> <mo>(</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>e</mi> </mrow> </msub> <mo>/</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>m</mi> </mrow> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> or <inline-formula> <math display="inline"> <semantics> <mrow> <mo form="prefix">log</mo> <mo>(</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>m</mi> </mrow> </msub> <mo>/</mo> <msub> <mi>ρ</mi> <mrow> <mi>d</mi> <mi>e</mi> </mrow> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> parameterizations, respectively. The main purpose of this paper is to demonstrate the applicability of the forms of suggested interactions to the problem of modern cosmology known as accelerated expansion of the Universe. Using the differential age of old galaxies expressed in terms of <inline-formula> <math display="inline"> <semantics> <mrow> <mi>H</mi> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> data, the peak position of baryonic acoustic oscillations (known as BAO data), the SN Ia data with strong gravitational lensing data, we obtain the best fit values of the model parameters for each case. Besides, using <inline-formula> <math display="inline"> <semantics> <mrow> <mi>O</mi> <mi>m</mi> </mrow> </semantics> </math> </inline-formula> analysis and <inline-formula> <math display="inline"> <semantics> <msub> <mi>S</mi> <mn>3</mn> </msub> </semantics> </math> </inline-formula> parameter from the statefinder hierarchy analysis, we also demonstrate that the considered models are clearly different from the <inline-formula> <math display="inline"> <semantics> <mi mathvariant="sans-serif">Λ</mi> </semantics> </math> </inline-formula>CDM model. We obtain that the models predict Hubble parameter values consistent to the estimations from gravitational lensing, which probes the expansion out to <inline-formula> <math display="inline"> <semantics> <mrow> <mi>z</mi> <mo>≤</mo> <mn>1.7</mn> </mrow> </semantics> </math> </inline-formula>. We show that, with considered models, we can also explain PLANCK 2015 and PLANCK 2018 experiment results. |
topic |
accelerated expansion dark energy parameterization Hubble parameter |
url |
https://www.mdpi.com/2073-8994/10/11/577 |
work_keys_str_mv |
AT martiroskhurshudyan someinteractingdarkenergymodels AT asaturzhkhurshudyan someinteractingdarkenergymodels |
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