Results 21 to 30 of about 18,336 (194)
A Conformal Mapping and Isothermal Perfect Fluid Model [PDF]
, 1996 Instead of conformal to flat spacetime, we take the metric conformal to a spacetime which can be thought of as ``minimally'' curved in the sense that free particles experience no gravitational force yet it has non-zero curvature.
D. Kramer +8 more
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Generating perfect fluid spheres in general relativity [PDF]
, 2005 Ever since Karl Schwarzschild's 1916 discovery of the spacetime geometry describing the interior of a particular idealized general relativistic star -- a static spherically symmetric blob of fluid with position-independent density -- the general ...
H. Bondi +5 more
core +1 more source
Charged perfect fluid sphere in higher-dimensional spacetime [PDF]
Indian Journal of Physics, 2019 Present paper provides a new model for perfect fluid sphere filled with charge in higher dimensional spacetime admitting conformal symmetry. We consider a linear equation of state with coefficients fixed by the matching conditions at the boundary of the source corresponding to the exterior Reissner-Nordstr m higher dimensional spacetime.
P. Bhar +4 more
openaire +2 more sources
Generalized Lemaitre-Tolman-Bondi Solutions with Pressure [PDF]
, 2006 Utilizing the ADM equations, we derive a metric and reduced field equations describing a general, spherically symmetric perfect fluid. The metric describes both the interior perfect fluid region and exterior vacuum Schwarzschild spacetime in a single ...
Lasky, Paul, Lun, Anthony
core +2 more sources
Infinite Kinematic Self-Similarity and Perfect Fluid Spacetimes [PDF]
General Relativity and Gravitation, 2001 38 pages, 6 figures.
Sintes, A., Benoit, P., Coley, A.
openaire +3 more sources
Some curvature properties of perfect fluid spacetimes
Quaestiones Mathematicae, 2023 In this paper we assume that a perfect fluid is the source of the gravitational field while analyzing the solutions to the Einstein field equations.
Krishnendu De +2 more
openaire +3 more sources
A complete study of conformally flat pseudo-symmetric spacetimes in the theory of F ( R ) -gravity
Results in Physics, 2022 The motive in this article is twofold. First we investigate the geometrical structures of a pseudo-symmetric spacetime ( P S ) 4 with a timelike vector under the condition of conformal flatness.
Avik De +3 more
doaj +1 more source
A Possible Explanation of Dark Matter and Dark Energy Involving a Vector Torsion Field
Universe, 2022 A simple gravitational model with torsion is studied, and it is suggested that it could explain the dark matter and dark energy in the universe. It can be reinterpreted as a model using the Einstein gravitational equations where spacetime has regions ...
Graeme W. Milton
doaj +1 more source
Stability of generic thin shells in conformally flat spacetimes
European Physical Journal C: Particles and Fields, 2017 Some important spacetimes are conformally flat; examples are the Robertson–Walker cosmological metric, the Einstein–de Sitter spacetime, and the Levi-Civita–Bertotti–Robinson and Mannheim metrics.
Z. Amirabi
doaj +1 more source
European Physical Journal C: Particles and Fields, 2022 We investigate the possibility of existing a class of compact charged spheres made of a charged perfect fluid in the framework of Einstein–Gauss–Bonnet theory in five-dimensional spacetime (5D EGB).
S. K. Maurya +3 more
doaj +1 more source