Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach
Abstract The model of holographic dark energy in which dark energy interacts with dark matter is investigated in this paper. In particular, we consider the interacting holographic dark energy model in the context of a perturbed universe, which was never investigated in the literature. To avoid the l...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-10-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6338-3 |
| _version_ | 1818534245575950336 |
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| author | Lu Feng Yun-He Li Fei Yu Jing-Fei Zhang Xin Zhang |
| author_facet | Lu Feng Yun-He Li Fei Yu Jing-Fei Zhang Xin Zhang |
| author_sort | Lu Feng |
| collection | DOAJ |
| description | Abstract The model of holographic dark energy in which dark energy interacts with dark matter is investigated in this paper. In particular, we consider the interacting holographic dark energy model in the context of a perturbed universe, which was never investigated in the literature. To avoid the large-scale instability problem in the interacting dark energy cosmology, we employ the generalized version of the parameterized post-Friedmann approach to treating the dark energy perturbations in the model. We use the current observational data to constrain the model. Since the cosmological perturbations are considered in the model, we can then employ the redshift-space distortions (RSD) measurements to constrain the model, in addition to the use of the measurements of expansion history, which has never been done in the literature. We find that, for both the cases with $$Q=\beta H\rho _\mathrm{c}$$ Q=βHρc and with $$Q=\beta H_0\rho _\mathrm{c}$$ Q=βH0ρc , the interacting holographic dark energy model is more favored by the current data, compared to the holographic dark energy model without interaction. It is also found that, with the help of the RSD data, a positive coupling $$\beta $$ β can be detected at the $$2.95\sigma $$ 2.95σ statistical significance for the case of $$Q=\beta H_0\rho _\mathrm{c}$$ Q=βH0ρc . |
| first_indexed | 2024-12-11T18:09:12Z |
| format | Article |
| id | doaj.art-ae1b6c910efc446c9ba5d9ff9969ebc5 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-11T18:09:12Z |
| publishDate | 2018-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-ae1b6c910efc446c9ba5d9ff9969ebc52022-12-22T00:55:37ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-10-0178101910.1140/epjc/s10052-018-6338-3Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approachLu Feng0Yun-He Li1Fei Yu2Jing-Fei Zhang3Xin Zhang4Department of Physics, College of Sciences, Northeastern UniversityDepartment of Physics, College of Sciences, Northeastern UniversityCollege of Sciences, Shenyang Aerospace UniversityDepartment of Physics, College of Sciences, Northeastern UniversityDepartment of Physics, College of Sciences, Northeastern UniversityAbstract The model of holographic dark energy in which dark energy interacts with dark matter is investigated in this paper. In particular, we consider the interacting holographic dark energy model in the context of a perturbed universe, which was never investigated in the literature. To avoid the large-scale instability problem in the interacting dark energy cosmology, we employ the generalized version of the parameterized post-Friedmann approach to treating the dark energy perturbations in the model. We use the current observational data to constrain the model. Since the cosmological perturbations are considered in the model, we can then employ the redshift-space distortions (RSD) measurements to constrain the model, in addition to the use of the measurements of expansion history, which has never been done in the literature. We find that, for both the cases with $$Q=\beta H\rho _\mathrm{c}$$ Q=βHρc and with $$Q=\beta H_0\rho _\mathrm{c}$$ Q=βH0ρc , the interacting holographic dark energy model is more favored by the current data, compared to the holographic dark energy model without interaction. It is also found that, with the help of the RSD data, a positive coupling $$\beta $$ β can be detected at the $$2.95\sigma $$ 2.95σ statistical significance for the case of $$Q=\beta H_0\rho _\mathrm{c}$$ Q=βH0ρc .http://link.springer.com/article/10.1140/epjc/s10052-018-6338-3 |
| spellingShingle | Lu Feng Yun-He Li Fei Yu Jing-Fei Zhang Xin Zhang Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach European Physical Journal C: Particles and Fields |
| title | Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach |
| title_full | Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach |
| title_fullStr | Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach |
| title_full_unstemmed | Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach |
| title_short | Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach |
| title_sort | exploring interacting holographic dark energy in a perturbed universe with parameterized post friedmann approach |
| url | http://link.springer.com/article/10.1140/epjc/s10052-018-6338-3 |
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