Friedmann equations of the fractal apparent horizon

被引:3
|
作者
Jalalzadeh, R. [1 ]
Jalalzadeh, S. [2 ,3 ]
Jahromi, A. Sayahian [4 ]
Moradpour, H. [5 ]
机构
[1] Univ Kurdistan, Fac Sci, Dept Phys, Pasdaran St,POB 66177-15175, Sanandaj, Iran
[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil
[3] Khazar Univ, Ctr Theoret Phys, 41 Mehseti St, AZ-1096 Baku, Azerbaijan
[4] Islamic Azad Univ, Zarghan Branch, Zarghan, Iran
[5] Univ Maragheh, Res Inst Astron & Astrophys Maragha RIAAM, POB 55136-553, Maragheh, Iran
来源
关键词
Friedmann equations; Fractals; Fractional derivative; Apparent horizon; Thermodynamics; Cosmology; FRACTIONAL ACTION COSMOLOGY; 1ST LAW; UNIVERSE; ENTROPY;
D O I
10.1016/j.dark.2024.101498
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
From a fractal perspective, the entropy bound of gravitational systems undergoes changes. Furthermore, in the cosmological setting, the conservation law of a perfect fluid is also altered in such systems, affecting spatial elements like volume, area, and radius. By applying the first law of thermodynamics and deriving the Friedmann equations, we can gain insight into the evolution of such a fractal cosmos. However, observations continue to necessitate the existence of a dark energy source. To address this, in this article, we have created a novel fractal Lambda CDM cosmological model and determined the fractal cosmological observables. We show that the spatial fractal dimension is two, and the age of the Universe is 13.91 Gyr, by fitting the model's parameters to cosmological data.
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页数:8
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