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- W2015461163 abstract "Exact solutions to the Einstein field equations with cosmic string and a space-varying cosmological constant, viz. Λ = Λ(r), in the energy–momentum tensors are presented. Three cases have been studied: the variable cosmological constant (1) has power law dependence, (2) is proportional to the string fluid density, and (3) is purely a constant. Some cases of interesting physical consequences have been found where (i) the variable cosmological constant can be represented by a power law of the type Λ = 3r -2 , (ii) the variable cosmological constant and the cosmic string density are interdependent according to the relation Λ = -8πρ s , and (iii) the cosmic string density can be scaled by a power law of the type ρ s = r -2 . It is also shown that several known solutions can be recovered from the general form of the solutions obtained here." @default.
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- W2015461163 date "2009-05-01" @default.
- W2015461163 modified "2023-09-27" @default.
- W2015461163 title "SCENARIOS OF COSMIC STRING WITH A VARIABLE COSMOLOGICAL CONSTANT" @default.
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- W2015461163 doi "https://doi.org/10.1142/s0218271809014753" @default.
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