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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2020
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| Acceso en línea: | https://arxiv.org/abs/2002.04097 |
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| _version_ | 1866913960919302144 |
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| author | Golanbari, Tayeb Saaidi, Khaled Karimi, Parvin |
| author_facet | Golanbari, Tayeb Saaidi, Khaled Karimi, Parvin |
| contents | Based on Renyi entropy, we study the entropy corrected version of the holographic dark energy (HDE) model in apparent horizon of spatially flat FLRW universe. Applying the generalized entropy leads to the modified version of the Friedmann evolution equations which besides pressure-less matter and HDE, there is an extra term that is purely geometric. This extra term are assumed as another part of dark energy. We assume the universe is filled by non-interacting components of ideal fluids such as dark matter and holographic dark energy. The total dark energy, which is a combination of generalized HDE and geometric part, has a density parameter that approaches one by decreasing the redshift. Considering the total equation of state parameter and deceleration parameter of the universe indicates that the universe could stays in positive accelerated expansion phase that shows an agreement with observational data, only for the specific values of the constant $ζ$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2002_04097 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Renyi entropy and the holographic dark energy in flat space time Golanbari, Tayeb Saaidi, Khaled Karimi, Parvin Cosmology and Nongalactic Astrophysics Based on Renyi entropy, we study the entropy corrected version of the holographic dark energy (HDE) model in apparent horizon of spatially flat FLRW universe. Applying the generalized entropy leads to the modified version of the Friedmann evolution equations which besides pressure-less matter and HDE, there is an extra term that is purely geometric. This extra term are assumed as another part of dark energy. We assume the universe is filled by non-interacting components of ideal fluids such as dark matter and holographic dark energy. The total dark energy, which is a combination of generalized HDE and geometric part, has a density parameter that approaches one by decreasing the redshift. Considering the total equation of state parameter and deceleration parameter of the universe indicates that the universe could stays in positive accelerated expansion phase that shows an agreement with observational data, only for the specific values of the constant $ζ$. |
| title | Renyi entropy and the holographic dark energy in flat space time |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2002.04097 |