Late-time constraints on homogeneous and isotropic FLRW cosmology with torsion

IF 3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
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Abstract

The present work deals with observational data analysis of four different models of homogeneous and isotropic Friedmann–Lemaitre–Robertson–Walker (FLRW) cosmology with torsion, where the torsion function is described by a scalar function ϕ(t) associated with the spin of the matter. It has been found that among the four models, the third model, where the torsion function is proportional to Hubble parameter as well as power law of matter density, best fits the observational data. Further, the evolution of the torsion function reveals that torsion was subdominant relative to matter energy density during the matter-dominated era. However, torsion gradually becomes dominant following the transition into the current late-time accelerating phase. It plays a pivotal role as an alternative to dark energy, thereby accounting for the present cosmic acceleration.
带扭转的同质和各向同性 FLRW 宇宙学的晚期制约因素
本研究涉及同质和各向同性的弗里德曼-勒梅特-罗伯逊-沃克(FLRW)宇宙学四种不同扭转模型的观测数据分析,其中扭转函数由与物质自旋相关的标量函数ϕ(t)描述。研究发现,在这四个模型中,第三个模型的扭转函数与哈勃参数以及物质密度的幂律成正比,最符合观测数据。此外,扭转函数的演变表明,在物质主导时代,扭转相对于物质能量密度处于次主导地位。然而,在过渡到当前的晚期加速阶段后,扭转逐渐成为主导。它作为暗能量的替代品发挥了关键作用,从而解释了当前宇宙加速的原因。
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来源期刊
Annals of Physics
Annals of Physics 物理-物理:综合
CiteScore
5.30
自引率
3.30%
发文量
211
审稿时长
47 days
期刊介绍: Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.
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