A Kerr-like radiating metric in the expanding universe

Patel, L. K.; Koppar, Sharda S.

doi:10.1007/bf03053840

Cited by 5 publications

(3 citation statements)

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“…In particular, the superposition of the Schwarzschild and FLRW solutions in this family is different from the McVittie solution [120]. This activity was started by Vaidya [169], who found a superposition of the Kerr and FLRW solutions, and the probably most sophisticated composite was found by Patel and Koppar [136]; it is an infinite sequence of perturbations of the flat FLRW background whose first-order term is the Kerr solution.…”

Section: Other Modelsmentioning

confidence: 93%

Inhomogeneous cosmological models: exact solutions and their applications

Bolejko

Célérier

Krasiński

2011

Class. Quantum Grav.

169

198

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Recently, inhomogeneous generalisations of the Friedmann -Lemaître -Robertson -Walker cosmological models have gained interest in the astrophysical community and are more often employed to study cosmological phenomena. However, in many papers the inhomogeneous cosmological models are treated as an alternative to the FLRW models. In fact, they are not an alternative, but an exact perturbation of the latter, and are gradually becoming a necessity in modern cosmology. The assumption of homogeneity is just a first approximation introduced to simplify equations. So far this assumption is commonly believed to have worked well, but future and more precise observations will not be properly analysed unless inhomogeneities are taken into account. This paper reviews recent developments in the field and shows the importance of an inhomogeneous framework in the analysis of cosmological observations. § The subclass of isotropic pressure is usually credited to Misner and Sharp [122], and occasionally to Podurets [139].

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Section: Other Modelsmentioning

confidence: 93%

Inhomogeneous cosmological models: exact solutions and their applications

Bolejko

Célérier

Krasiński

2011

Class. Quantum Grav.

169

198

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“…Patel and Dadhich [16] have discussed cylindrically symmetric models with the Kasnerian time evolution containing heat flow and null radiation flow with the perfect fluid. The null radiation flux has been investigated by Vaidya and Patel [17,18], Patel and Yadav [19], Patel and Koppar [20] and Singh [21].…”

Section: Introductionmentioning

confidence: 98%

Magnetized Emergent Universe with Null Radiation Flow

Singh

Rani

2015

Int J Theor Phys

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In this paper, we study the Bianchi type-I cosmological model in a different basic form incorporating with null radiation flow with the perfect fluid in the presence as well as absence of a source free magnetic field. A set of new exact solutions of Einstein field equations are obtained in both the cases. We observe that the emergent universe model with null radiation flow approaches to de-sitter universe at late time obeying the same rate of expansion in presence and absence of the magnetic field.

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“…Chan (1998) has developed an analytical solution of the Einstein equation for a collapsing radiating body consisting of an isotropic fluid with shear undergoing radial heat flow with outgoing radiation. The effect of heat flux in the evolution of the universe in the early stages has also been investigated by several authors as Deng (1989), Mukherjee (1986), Novello andReboucas (1978), Ray (1980), Reboucas andde Limma (1981, 1982), Reboucas (1982), Bradley andSviestins (1984), andSviestins (1985), while null radiation flux has been investigated by Patel (1986, 1989), Patel and Yadav (1987), and Patel and Koppar (1988).…”

Section: Introductionmentioning

confidence: 98%