Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Norman Cruz"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 11, Pp 1-9 (2024)
Abstract In this work we study the thermodynamics formulation for unimodular gravity under the election of two different models for the energy diffusion function. Such function encodes the current for the non-conservation of the energy-momentum tenso
Externí odkaz:
https://doaj.org/article/4527aa582b6b45b780bf34d1479baedc
Autor:
Mohsen Fathi, Norman Cruz
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 12, Pp 1-25 (2023)
Abstract In this study, we focus on a static spherically symmetric f(R) black hole spacetime characterized by a linear dark matter-related parameter. Our investigation delves into understanding the influence of different assumed values of this parame
Externí odkaz:
https://doaj.org/article/772a1d349e9f4cf9b5e69413abc1fc4e
Publikováno v:
Galaxies, Vol 12, Iss 5, p 52 (2024)
In this work, we test the ability of an exact solution, found in the framework of a nonlinear extension of the Israel–Stewart theory, to fit the supernovae Ia, gravitational lensing, and black hole shadow data. This exact solution is a generalizati
Externí odkaz:
https://doaj.org/article/5f716a481edb4b018db4238b14e5b957
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 2, Pp 1-12 (2023)
Abstract In the present work, we investigate the consequences of running gravitational coupling on the properties of the three-dimensional BTZ black hole. We take as starting point the functional form of gravitational coupling obtained in the context
Externí odkaz:
https://doaj.org/article/6cef5f4e021740f38e95904cb9aabc04
Publikováno v:
Symmetry, Vol 15, Iss 8, p 1485 (2023)
In this paper, we present a rotating de Rham–Gabadadze–Tolley black hole with a positive cosmological constant under massive gravity, achieved by applying a modified Newman–Janis algorithm. The black hole exhibited stable orbits of constant rad
Externí odkaz:
https://doaj.org/article/1d0dad77e2b1434ca86277c745d64a8c
Publikováno v:
Symmetry, Vol 14, Iss 9, p 1866 (2022)
Extensions to a ΛDM model have been explored in order to face current tensions that occur within its framework, which encompasses broadening the nature of the dark matter (DM) component to include warmness and a non-perfect fluid description. In thi
Externí odkaz:
https://doaj.org/article/d80cb1b7f5bd4b909a11d8b4a65a8a00
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 7, Pp 1-9 (2018)
Abstract In this paper the Lagrangian density of a purely kinetic k-essence model that describes the behavior of dark energy described by four parameterized equations of state proposed by Cooray and Huterer (Astrophys J 513:L95, 1999), Zhang and Wu (
Externí odkaz:
https://doaj.org/article/547f2869a88a4634ab8c9a3d73907ed4
Autor:
Mauricio Cataldo, Norman Cruz
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 1, Pp 1-10 (2018)
Abstract It is well known that for spatially flat FRW cosmologies, the holographic dark energy disfavors the Hubble parameter as a candidate for the IR cutoff. For overcoming this problem, we explore the use of this cutoff in holographic ellipsoidal
Externí odkaz:
https://doaj.org/article/ef4982912f0d40c68b3721ef3cd0e9ff
Publikováno v:
Universe, Vol 7, Iss 8, p 278 (2021)
We study the impact of a non-vanishing (positive) cosmological constant on the innermost and outermost stable circular orbits (ISCOs and OSCOs, respectively) within massive gravity in four dimensions. The gravitational field generated by a point-like
Externí odkaz:
https://doaj.org/article/a768f6f88acb45588eb7aedd42284361
Publikováno v:
Physics Letters B, Vol 769, Iss C, Pp 159-165 (2017)
In this paper we present a phantom solution with a big rip singularity in a non-linear regime of the Israel–Stewart formalism. In this framework it is possible to extend this causal formalism in order to describe accelerated expansion, where assump
Externí odkaz:
https://doaj.org/article/4b8a4faf60c64294a97fe271d3d4976a