各向异性宇宙在 f(R,T) 引力理论下的约束

IF 10.2 4区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Journal of High Energy Astrophysics Pub Date : 2024-11-01 DOI:10.1016/j.jheap.2024.11.001
Lokesh Kumar Sharma , Suresh Parekh , Saibal Ray , Anil Kumar Yadav
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引用次数: 0

摘要

我们研究了在 f(R,T) 的修正引力场理论中出现比安奇 V 宇宙的可能性。为了求解场方程,我们还考虑了缩放因子的幂律。为了将模型参数与观测数据进行比较,我们在哈勃参数、重子声学振荡、泛神论、哈勃参数+泛神论联合数据集以及哈勃参数+重子声学振荡+泛神论集合数据集下对模型进行了约束。本纪哈勃参数的结果是可以接受的,尤其是我们对 H0 的估计与普朗克合作组织最近利用Λ-CDM 模型进行的各种研究结果非常一致。
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Constraining anisotropic universe under f(R,T) theory of gravity
We investigate the possibility of a Bianchi V universe in the modified gravitational field theory of f(R,T). We have considered a Lagrangian model in connection between the trace of the energy-momentum tensor T and the Ricci scalar R. In order to solve the field equations a power law for the scaling factor was also considered. To make a comparison of the model parameters with the observational data we put constraint on the model under the datasets of the Hubble parameter, Baryon Acoustic Oscillations, Pantheon, joint datasets of Hubble parameter + Pantheon and collective datasets of the Hubble parameter + Baryon Acoustic Oscillations + Pantheon. The outcomes for the Hubble parameter in the present epoch are reasonably acceptable, especially our estimation of this H0 is remarkably consistent with various recent Planck Collaboration studies that utilize the Λ-CDM model.
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来源期刊
Journal of High Energy Astrophysics
Journal of High Energy Astrophysics Earth and Planetary Sciences-Space and Planetary Science
CiteScore
9.70
自引率
5.30%
发文量
38
审稿时长
65 days
期刊介绍: The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.
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