公式省略]引力中以哈勃视界为红外截止点的 LRS 比安奇 I 型

IF 1.9 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS New Astronomy Pub Date : 2024-07-04 DOI:10.1016/j.newast.2024.102274
Syed Mudassir Syed Iqbal , G.U. Khapekar , S.H. Shekh , A. Dixit
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引用次数: 0

摘要

我们探索了全息暗能量模型,将哈勃地平线(Hubble's Horizon)作为局部旋转对称(LRS)边奇 I 型的红外(IR)截止点,并在分析中考虑了引力框架。为了求解场方程,我们假设了一个关系和体积幂律膨胀(其中为常数)。我们用红移表示了各种关键的宇宙学参数,并用图形描述了它们,以加深我们对宇宙膨胀和演化的理解,如全息暗能量密度()、全息暗能量压力()、状态方程参数()、总能量密度参数()等。此外,我们还通过声速平方检验分析了我们模型中宇宙的稳定性及其在能量条件下的有效性。最终,我们的模型表明,宇宙目前正处于膨胀阶段,表现出加速阶段,接近于平面几何,其行为类似于五元暗能量模型。
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LRS Bianchi type-I with Hubble’s horizon as IR cut-off in f(R) gravity

we explored the holographic dark energy model using Hubble’s Horizon as the infrared (IR) cut-off in Locally Rotationally Symmetric (LRS) Bianchi type-I, considering the f(R) gravity framework in our analysis. In order to solve the field equations, we assume a relation Fam and volumetric power law expansion (where m is constant). we have expressed various crucial cosmological parameters in terms of the redshift z and depicted them graphically to enhance our understanding of the expansion and evolution of the universe like holographic dark energy density (ρΛ), holographic dark energy pressure (pΛ), equation of state parameter (ω) , total energy density parameter (Ω) etc. Also, we analyzed the stability of the universe in our model through the squared speed of sound test and its validity by energy conditions. Ultimately, our model indicates that the universe is currently in an expanding phase, exhibiting an accelerating phase, closely approaching a flat geometry, and its behavior resembles that of a quintessence dark energy model.

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来源期刊
New Astronomy
New Astronomy 地学天文-天文与天体物理
CiteScore
4.00
自引率
10.00%
发文量
109
审稿时长
13.6 weeks
期刊介绍: New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.
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