Results 31 to 40 of about 18,336 (194)
Some properties of Jordan-Ehlers spacetime
International Journal of Mathematics and Mathematical Sciences, 1987 It is shown that for cylindrically symmetric Jordan-Ehlers spacetime, either the charged scalar meson field associated with meson rest mass M or the charged perfect fluid cannot be the source for generating gravitation.
G. Mohanty, U. K. Panigrahi
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Gravitational field of a spherical perfect fluid
European Physical Journal C: Particles and Fields, 2019 Analyzing the spacetime for a static spherically distributed perfect fluid we show that the smooth matching of the interior and exterior metrics for a realistic source is possible only for the distances from the origin that exceeds the photon sphere ...
Merab Gogberashvili, Beka Modrekiladze
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Semiconformal curvature tensor and perfect fluid spacetimes in general relativity
Journal of Taibah University for Science, 2020 The semiconformal curvature tensor and its divergence have been studied for perfect fluid spacetimes. It is seen, apart from other results, that the perfect fluid spacetimes with divergence-free semiconformal curvature tensor either satisfy the vacuum ...
Musavvir Ali +2 more
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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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Singularity-Free Cylindrical Cosmological Model
, 2004 A cylindrically symmetric perfect fluid spacetime with no curvature singularity is shown. The equation of state for the perfect fluid is that of a stiff fluid. The metric is diagonal and non-separable in comoving coordinates for the fluid.
Beem J +11 more
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Critical Robertson-Walker universes [PDF]
, 2019 The integral of the energy density function $\mathfrak m$ of a closed Robertson-Walker (RW) spacetime with source a perfect fluid and cosmological constant $\Lambda$ gives rise to an action functional on the space of scale functions of RW spacetime ...
Eshkobilov, Olimjon +2 more
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Generalized Almost Schouten Solitons in LP-Sasakian Geometry and Relativistic Spacetimes
AppliedMathThe objective of this work is to characterize certain geometric aspects of LP-Sasakian (LPS) manifolds admitting a generalized almost Schouten soliton (GASS) and to prove that a such manifold with GASS is of constant scalar curvature.
Sunil Kumar Yadav +2 more
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Gravitational collapse in Rastall gravity
Physics Letters B, 2019 We study spherically symmetric gravitational collapse of a homogeneous perfect fluid in Rastall gravity. Considering a linear equation of state (EoS) for the fluid profiles, we examine the conditions under which the collapse scenario could end in a ...
A. H. Ziaie, H. Moradpour, S. Ghaffari
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Brane world models with bulk perfect fluid and broken 4D Poincare invariance
, 2018 We consider 5D brane world models with broken global 4D Poincar\a'{e} invariance (4D part of the spacetime metric is not conformal to the Minkowski spacetime). The bulk is filled with the negative cosmological constant and may contain a perfect fluid. In
Akarsu, Ozgur +4 more
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Complete deformed charged anisotropic spherical solution satisfying Karmarkar condition
Results in Physics, 2021 The study of solution for the compact stellar objects such as neutron stars, white dwarfs, and black holes have attracted much consideration in recent days.
S.K. Maurya +3 more
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