A Higher-Dimensional LRS Bianchi Type-V String Cosmological Model in Brans-Dicke Scalar-Tensor Theory of Gravitation

Trivedi, Diksha; Bhabor, A. K.

doi:10.14445/22315373/ijmtt-v67i2p504

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Aside from the FLRW model [34], anisotropic cosmological models have been studied in the context of GR or the alternative theories to GR (in 4D as well as higher-dimensional contexts) [35][36][37][38][39][40], and noncompactified KK theories [12,[41][42][43]. In this paper, we presented the anisotropic BD-KS model as an application of the MBDT.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Noncompactified Kaluza–Klein Gravity

2022

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We present a brief description of noncompactified higher-dimensional theories from the perspective of general relativity. More concretely, the Space–Time–Matter theory, or Induced Matter theory, and the reduction procedure used to construct the modified Brans–Dicke theory and the modified Sáez–Ballester theory are briefly explained. Finally, we apply the latter to the Friedmann–Lemaître–Robertson–Walker (FLRW) cosmological models in arbitrary dimensions and analyze the corresponding solutions.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Noncompactified Kaluza–Klein Gravity

2022

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“…Several researchers have investigated cosmological models that incorporate cosmic strings within the viscous fluid. Hatkar et al (11) , Mishra and Dua (12) , Santhi et al (13) , Bhoyar et al (14) , Hegazy (15) , Trivedi and Bhabor (16) , Dixit et al (17) and Mete and Deshmukh (18) . The behaviour of viscous fluid in the string cosmological model in the Lyra manifold, which takes into account the constant coefficient of bulk viscosity, has recently been explored by Mollah and Singh (19) .…”

Section: Introductionmentioning

confidence: 99%

String Viscous Fluid Cosmological Model in the Framework of Sen-Dunn Theory of Gravitation

Lambat,

Pund

2024

IJST

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Objective: To present a new solution to the field equations for higher-dimensional Bianchi type-III string viscous fluid cosmological model in the context of the Sen-Dunn theory of gravity. Methods: To obtain definite solution of the field equations, we consider a power law relation between the scale factor and scalar field, and we take into account two distinct scale factors, and , in which , are positive constants. This produces a time-dependent deceleration parameter. We analyse the model with constant bulk viscosity constant to explain the current accelerated expansion of the universe. Findings: Spatial volume of the model increases with cosmic time, which shows that universe is spatially expanding. Also, the model possesses a point-type singularity. It is noted that these models depict the universe's accelerated expansion. Novelty: We obtained new solution to the field equations for higher dimensional Bianchi type-III generated by means of a cloud of strings with bulk viscous fluid in Sen-Dunn theory by using quadratic form. Keywords: Bianchi type-III, Cosmic string, Bulk viscosity, Sen-Dunn Theory

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“…Moreover, they made it clear that the difference of the gravitational and inertial masses is caused by the destruction of Burkeff's theorem in KK universe, which is considered to be the principle of equivalence (PoE). Other scholars such as Leon (1988) [6] , Chi (1990) [7] , Liu (1994) [8] , Coley (1994) [9] , Ghate (2014) [10] , and Trivedi (2021) [11] have surveyed higher dimensional cosmological models in different alternatives to GR. The problem of string cloud and domain walls with the quark model was investigated by Adhav et al, (2008) [12] , and the set up of higher dimensional KK theory was successful there.…”

Section: Introductionmentioning

confidence: 99%

Higher dimensional Bianchi type-I string cosmological model in f(R) theory of gravity

Al-Haysah

Hasmani

2021

Heliyon

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In this paper, we have studied Bianchi type-I string cosmological model by combining Kaluza-Klein (KK) theory and theory of gravity which is an extension of 5-dimensional KK string cosmological models. We have used equation of state in the form of p-string or Takabayasi string given by 1 , where ρ and λ denote the rest density of energy cloud of strings, and the tension density of the system of strings, respectively and ω is a constant. In order to get physically significant and viable solution various forms of the function are assumed, in this paper we assume (e.g. Astashenok et al. (2017) [1] ), where α is real number. Some physical and geometrical properties of the model are also discussed.

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A Higher-Dimensional LRS Bianchi Type-V String Cosmological Model in Brans-Dicke Scalar-Tensor Theory of Gravitation

Cited by 3 publications

References 11 publications

Noncompactified Kaluza–Klein Gravity

Noncompactified Kaluza–Klein Gravity

String Viscous Fluid Cosmological Model in the Framework of Sen-Dunn Theory of Gravitation

Higher dimensional Bianchi type-I string cosmological model in f(R) theory of gravity

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