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arXiv 1809.07595gr-qc
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一个相互作用的新全息暗能量模型:观测约束

On An Interacting New Holographic Dark Energy Model: observational constraints

Ehsan Sadri, Martiros Khurshudyan

摘要:

本文研究了空间平坦FRW宇宙中相互作用DGP膜世界全息暗能量模型。主要是,在这项研究中,我们集中我们的注意力在相互作用和非相互作用的形式的模型。研究表明,状态方程和减速参数描绘了一个加速宇宙的各种相互作用。另一方面,状态分析表明,相互作用和非相互作用的行为类似于quintessence和幻影暗能量,并为现值服从quintessence的行为。此外,$Om$ -诊断的结果是强调的状态方程的结果表明,目前的模型是在精华是在后期的时间具有类似的行为。通过对声速平方$v^2_s$的分析,我们发现该模式具有很好的稳定性。为了获得这项工作中参数的最佳拟合值,我们使用了最新的观测数据(Pantheon,Boss DR 12和Planck 2015),通过使用EMCEE python包实现MCMC方法。我们还使用赤池信息准则(AIC)和贝叶斯信息准则(BIC)的模型选择工具,并比较模型与$Λ$ CDM作为参考模型。

英文摘要:

In this paper, we study the interacting DGP braneworld Holographic Dark Energy model in a spatially flat FRW universe. Mainly, in this study we concentrate our attention on both interacting and non-interacting form of the model. The study shows that the equation of state and the deceleration parameter depict an accelerated universe for all variety of interactions. On the other hand, the StateFinder analysis shows that of the interacting and non-interacting behave similar to both quintessence and phantom dark energy and for the present value obey the behavior of quintessence. Moreover, the result of $Om$-diagnostic is an emphasis on the result of the equation of state showing that the current model is in the quintessence are with Phantom-like behavior in the late time. By the use of the squared sound speed $v^2_s$ we find that the present mode has a good stability. In order to obtain the best fit values of the parameters in this work we used the latest observational data (Pantheon, Boss DR12 and Planck 2015) implementing MCMC method by the use of EMCEE python package. We also employ Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC) model selection tools and compare the model with $Λ$CDM as the reference model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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