Results 111 to 120 of about 18,336 (194)

Signatures of non-metricity on dynamical analysis of isotropic cosmological models

Nuclear Physics B
The characteristics of compact stars are examined in this study utilizing the Kohler-Chao-Tikekar and Tolman IV spacetime models. This study is framed within the f(Q) gravity, a geometric theory of gravity where spacetime curvature is describe by the non-
Tayyab Naseer, M. Sharif, M. Waqas, Kottakkaran Sooppy Nisar, Mohammed Zakarya   +4 more
doaj   +1 more source

Stability Properties of Geometrothermodynamic Cosmological Models. [PDF]

Entropy (Basel), 2023
Beissen N, Abishev M, Khassanov M, Aitassov T, Mamatova S, Toktarbay S.   +5 more
europepmc   +1 more source

Cosmological analogies for geophysical flows, Lagrangians, and new analogue gravity systems. [PDF]

Eur Phys J C Part Fields, 2023
Faraoni V, Jose S.
europepmc   +1 more source

Collisions and particle dynamics around black holes surrounded by PFDM in STVG

European Physical Journal C: Particles and Fields
Testing dark matter effects on gravity around black holes in the framework of gravity theories through observational data is an essential task of relativistic astrophysical studies.
Isomiddin Nishonov, Javlon Rayimbaev, Saeed Ullah Khan, Muhammad Zahid, Temurmalik Tolibjanov, Inomjon Ibragimov   +5 more
doaj   +1 more source

Rainich-type Conditions for Perfect Fluid Spacetimes

, 2014
In this worksheet we describe and illustrate a relatively simple set of new Rainich-type conditions on an n-dimensional spacetime which are necessary and sufficient for it to define a perfect fluid solution of the Einstein field equations. Procedures are provided which implement these Rainich-type conditions and which reconstruct the perfect fluid from
Krongos, Dionisios, Torre, Charles G
openaire   +1 more source

Geometry of static w = - 1 / 5 perfect fluid spheres in general relativity. [PDF]

Eur Phys J C Part Fields, 2022
Fazlpour B, Banijamali A, Faraoni V.
europepmc   +1 more source

Scalar field as a perfect fluid: thermodynamics of minimally coupled scalars and Einstein frame scalar-tensor gravity. [PDF]

Eur Phys J C Part Fields, 2023
Faraoni V, Giardino S, Giusti A, Vanderwee R.   +3 more
europepmc   +1 more source

Thermal stability of stealth and de Sitter spacetimes in scalar-tensor gravity. [PDF]

Eur Phys J C Part Fields, 2023
Giardino S, Giusti A, Faraoni V.
europepmc   +1 more source

Exploration of a singular fluid spacetime. [PDF]

Gen Relativ Gravit, 2021
Remmen GN.
europepmc   +1 more source

Inhomogeneous and Radiating Composite Fluids. [PDF]

Entropy (Basel), 2021
Brassel BP, Maharaj SD, Goswami R.
europepmc   +1 more source