Non-static axisymmetric structures embedded in an asymptotically $$\Lambda $$CDM universe

Abstract We construct non-static adiabatic axisymmetric structures embedded in an asymptotically $$\Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Λ</mml:mi> </mml:math> CDM universe from given solutions of the Poisson’s equation of Newtonian gravity, using a particular form of the metric in isotropic coordinates. The approach is used in building of a razor-thin disk source made of perfect fluid for the McVittie metric, a system composite by a Plummer-type perfect fluid razor-thin disk surrounded by an halo also of perfect fluid, and a model of Miyamoto–Nagai-type anisotropic fluid thick disks, embedded in an asymptotic $$\Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Λ</mml:mi> </mml:math> CDM universe. In the especial case of spherical symmetry, we also present a family of models of expanding anisotropic thick spherical shells. Moreover, the geodesic motion of test particles in stable circular orbits around of the structures, the fulfilment of the energy conditions and principal stresses (pressure) are analyzed.

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Publication Details

Journal
General Relativity and Gravitation
Published
2025-02-01
DOI
https://doi.org/10.1007/s10714-025-03359-4
Primary Topic
Cosmology and Gravitation Theories
Type
article
Field-Weighted Citation Impact
0.00

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article

Non-static axisymmetric structures embedded in an asymptotically $$\Lambda $$CDM universe

Gonzalo García-Reyes
General Relativity and Gravitation
Cosmology and Gravitation Theories
article

Non-static axisymmetric structures embedded in an asymptotically $$\Lambda $$CDM universe

Gonzalo García-Reyes
article en

Abstract

Abstract We construct non-static adiabatic axisymmetric structures embedded in an asymptotically $$\Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Λ</mml:mi> </mml:math> CDM universe from given solutions of the Poisson’s equation of Newtonian gravity, using a particular form of the metric in isotropic coordinates. The approach is used in building of a razor-thin disk source made of perfect fluid for the McVittie metric, a system composite by a Plummer-type perfect fluid razor-thin disk surrounded by an halo also of perfect fluid, and a model of Miyamoto–Nagai-type anisotropic fluid thick disks, embedded in an asymptotic $$\Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Λ</mml:mi> </mml:math> CDM universe. In the especial case of spherical symmetry, we also present a family of models of expanding anisotropic thick spherical shells. Moreover, the geodesic motion of test particles in stable circular orbits around of the structures, the fulfilment of the energy conditions and principal stresses (pressure) are analyzed.

General Relativity and GravitationVol. 57(2)
Technological University of Pereira (CO)
Universidad Tecnológica de Pereira
Affordable and clean energy
Openalex Percentile: Top 98%
Cosmology and Gravitation Theories
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