Results 1 to 10 of about 47 (47)
Results in Physics, 2021 Static spaces (with perfect fluids) appeared in a natural way both in physics (cf. Hawking and Ellis, 1975) and mathematics (cf. A. Fischer and J. Marsden, Duke Math. J. 42 (3) (1975), 519–547).
Ibrahim Al-Dayel +2 more
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Geometry of static $$w=-1/5$$ w = - 1 / 5 perfect fluid spheres in general relativity
European Physical Journal C: Particles and Fields, 2022 We discuss the physical features of two recent classes of analytical solutions of the Einstein equations sourced by an exotic perfect fluid with equation of state $$ P=-\rho /5$$ P = - ρ / 5 .
Behnaz Fazlpour +2 more
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Static and stationary dark fluid universes: a gravitoelectromagnetic perspective
Scientific Reports, 2022 The usual characterization of exact solutions of Einstein field equations, including cosmological solutions, is based on the symmetry properties of their corresponding metrics which is obviously mathematically involved.
M. Nouri-Zonoz, A. Nourizonoz
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Charged fluids in higher order gravity
European Physical Journal C: Particles and Fields, 2023 We generate the field equations for a charged gravitating perfect fluid in Einstein–Gauss–Bonnet gravity for all spacetime dimensions. The spacetime is static and spherically symmetric which gives rise to the charged condition of pressure isotropy that ...
Shavani Naicker +2 more
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Stability of Einstein static state universe in the spatially flat branemodels
Physics Letters B, 2016 With the assumption that a perfect fluid with a constant equation of state is the only energy component on the brane, we study the stability of Einstein static state solution under homogeneous and inhomogeneous scalar perturbations in both spatially flat
Kaituo Zhang +3 more
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Odessa Astronomical Publications, 2013 Solutions to Einstein’s field equations, for a static spherically symmetric perfect fluid model with linear equation of state are found exactly. It is shown that space of WD can be presented as a space with deformed Heisenberg algebra so WD observational ...
Christian Scherbakov
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Cylindrical wormholes and electromagnetic field
Nuclear Physics B, 2023 In this manuscript, we study the construction of static cylindrically symmetric thin shell wormhole models with an electric charge in the background of f(R,T) gravity.
M. Yousaf, M.Z. Bhatti, Z. Yousaf
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Solitonic Aspect of Relativistic Magneto-Fluid Spacetime with Some Specific Vector Fields
Mathematics, 2023 The target of the current research article is to investigate the solitonic attributes of relativistic magneto-fluid spacetime (MFST) if its metrics are Ricci–Yamabe soliton (RY-soliton) and gradient Ricci–Yamabe soliton (GRY-soliton).
Mohd Danish Siddiqi +2 more
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Modified Gauge Invariant Einstein-Maxwell Gravity and Stability of Spherical Perfect Fluid Stars with Magnetic Monopoles [PDF]
Iranian Journal of Astronomy and AstrophysicsAs an alternative gravity model, we consider an extended Einstein-Maxwell gravity containing a gauge invariance property. An extension is assumed to be an addition of a directional coupling between spatial electromagnetic fields with the Ricci tensor. We
Hossein Ghaffarnejad, Leyla Naderi
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European Physical Journal C: Particles and Fields, 2023 In this article, we provide a new model of static charged anisotropic fluid sphere made of a charged perfect fluid in the context of 5D Einstein–Maxwell–Gauss–Bonnet (EMGB) gravity theory.
Pramit Rej +2 more
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