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Modeling of Accelerating Universe with Bulk Viscous Fluid in Bianchi V Space-Time
Fortschritte der Physik ( IF 5.6 ) Pub Date : 2021-03-03 , DOI: 10.1002/prop.202100007
G. K. Goswami 1 , Anil Kumar Yadav 2 , B. Mishra 3 , S. K. Tripathy 4
Affiliation  

In this paper, we have investigated a bulk viscous anisotropic Universe and constrained its model parameters with recent urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0001 and Pantheon compilation data. Using cosmic chronometric technique, we estimate the present value of Hubble's constant as urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0002, urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0003 and urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0004 by bounding our derived model with recent urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0005 data, Pantheon and joint urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0006 and Pantheon data respectively. The present age of the Universe is specified as urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0007 Gyrs. The model favours a transitioning Universe with the transition red-shift as urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0008. We have reconstructed the jerk parameter using the observational data sets. From the analysis of the jerk parameter, it is observed that, our derived model shows a marginal departure from the concordance ΛCDM model.

中文翻译:

比安奇 V 时空大体积粘性流体加速宇宙的建模

在本文中,我们研究了一个大块粘性各向异性宇宙,并用最近的urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0001和万神殿的编译数据约束了它的模型参数。使用宇宙计时技术,我们将哈勃常数的现值估计为骨灰盒:x-wiley:00158208:media:prop202100007:prop202100007-math-0002urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0003urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0004通过将我们的派生模型分别与最近的urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0005数据、万神殿和联合urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0006以及万神殿数据进行绑定。宇宙的当前年龄被指定为urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0007Gyrs。该模型支持过渡的宇宙,过渡红移为urn:x-wiley:00158208:media:prop202100007:prop202100007-math-0008。我们已经使用观测数据集重建了jerk 参数。从对jerk参数的分析可以看出,我们的推导模型显示出与一致性ΛCDM模型的边际偏离。
更新日期:2021-03-03
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