Study of Decoupled Cosmological Solutions in f(R,T) Theory

被引:40
作者
Naseer, Tayyab [1 ,2 ]
Sharif, M. [1 ]
机构
[1] Univ Lahore, Dept Math & Stat, 1-KM Def Rd, Lahore, Pakistan
[2] Univ Punjab, Dept Math, Quaid e Azam Campus, Lahore 54590, Pakistan
来源
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS | 2023年 / 71卷 / 6-7期
关键词
f(R; T); theory; Cosmology; Gravitational decoupling; TOLMAN VII SOLUTION; F R; ANISOTROPIC SOLUTIONS; STABILITY; UNIVERSE; GRAVITY; REDSHIFT; ISOTROPY; CRACKING; MODEL;
D O I
10.1002/prop.202300004
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, we consider a non-static spherical geometry and formulate its extension for the case of anisotropic matter configuration through minimal gravitational decoupling in f(R,T) theory. We apply a particular transformation only on the radial metric function that divides the modified field equations into two distinct sectors corresponding to their parent (original and additional) sources. The unknowns in the first (isotropic) set are reduced by taking the Friedmann-Lemaitre-Robertson-Walker cosmic model. We then obtain the isotropic solution by employing a linear equation of state and power-law form of the scale factor. The other set involves the decoupling function and components of an extra source, therefore we adopt a density-like constraint to close it. Finally, we analyze the role of this modified gravity and the decoupling parameter on three different eras of the cosmos by graphically observing the developed extended solution. It is concluded that the resulting solutions fulfill all the physical requirements only for the matter and radiation-dominated eras.
引用
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页数:13
相关论文
共 49 条
[1]   Sound speeds, cracking and the stability of self-gravitating anisotropic compact objects [J].
Abreu, H. ;
Hernandez, H. ;
Nunez, L. A. .
CLASSICAL AND QUANTUM GRAVITY, 2007, 24 (18) :4631-4645
[2]   A preference for a non-zero neutrino mass from cosmological data [J].
Allen, SW ;
Schmidt, RW ;
Bridle, SL .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 346 (02) :593-600
[3]   Searching for a cosmological preferred axis: Union2 data analysis and comparison with other probes [J].
Antoniou, I. ;
Perivolaropoulos, L. .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2010, (12)
[4]   Extreme neutron stars from Extended Theories of Gravity [J].
Astashenok, Artyom V. ;
Capozziello, Salvatore ;
Odintsov, Sergei D. .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2015, (01)
[5]   An anisotropic version of Tolman VII solution in f(R, T) gravity via gravitational decoupling MGD approach [J].
Azmat, Hina ;
Zubair, M. .
EUROPEAN PHYSICAL JOURNAL PLUS, 2021, 136 (01)
[6]   Cosmological viable f (R, T) dark energy model: dynamics and stability [J].
Baffou, E. H. ;
Kpadonou, A. V. ;
Rodrigues, M. E. ;
Houndjo, M. J. S. ;
Tossa, J. .
ASTROPHYSICS AND SPACE SCIENCE, 2015, 356 (01) :173-180
[7]   First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations:: Preliminary maps and basic results [J].
Bennett, CL ;
Halpern, M ;
Hinshaw, G ;
Jarosik, N ;
Kogut, A ;
Limon, M ;
Meyer, SS ;
Page, L ;
Spergel, DN ;
Tucker, GS ;
Wollack, E ;
Wright, EL ;
Barnes, C ;
Greason, MR ;
Hill, RS ;
Komatsu, E ;
Nolta, MR ;
Odegard, N ;
Peiris, HV ;
Verde, L ;
Weiland, JL .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2003, 148 (01) :1-27
[8]   Extra force in f(R) modified theories of gravity [J].
Bertolami, Orfeu ;
Bohmer, Christian G. ;
Harko, Tiberiu ;
Lobo, Francisco S. N. .
PHYSICAL REVIEW D, 2007, 75 (10)
[9]  
CAPOZZIELLO S, 2008, PHYS LETT B, V25
[10]   Gravitational decoupling in cosmology [J].
Cedeno, Francisco X. Linares ;
Contreras, Ernesto .
PHYSICS OF THE DARK UNIVERSE, 2020, 28