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Modeling and testing the equation of state for (Early) dark energy
Physics of the Dark Universe ( IF 5.0 ) Pub Date : 2021-05-20 , DOI: 10.1016/j.dark.2021.100837
Shin’ichi Nojiri , Sergei D. Odintsov , Diego Sáez-Chillón Gómez , German S. Sharov

A general equation of state is considered for analyzing the possible behaviors for (Early) dark energy that alleviates the Hubble parameter tension problem. By departing from the possible evolution for the (Early) dark energy density and the corresponding dynamical equations, the equation of state is obtained, which allow us to analyze qualitatively the cosmological evolution and the dominance of each term in the equation of state along the cosmic expansion, which show some interesting consequences as the occurrence of (past) future singularities. Then, by considering two general models, their free parameters are fit with different sources of data, showing the goodness of the fits in comparison to more standard models. Results might be considered as a promising starting point to get a better understanding of the cosmological evolution as a whole.



中文翻译:

建模和测试(早期)暗能量的状态方程

考虑使用一般状态方程来分析(早期)暗能量的可能行​​为,从而缓解哈勃参数张力问题。通过远离(早期)暗能量密度和相应的动力学方程的可能演化,获得状态方程,这使我们能够定性地分析宇宙演化和状态方程沿着宇宙的每个项的优势扩展,随着(过去)未来奇异点的出现,显示出一些有趣的结果。然后,通过考虑两个通用模型,将它们的自由参数与不同的数据源进行拟合,从而表明与更标准的模型相比,拟合的优越性。结果可能被认为是更好地了解整个宇宙学演变的一个有前途的起点。

更新日期:2021-05-24
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