Zobrazeno 1 - 10
of 4 490
pro vyhledávání: '"Gonzalo, J."'
We explore a static and stationary black bounce geometry inspired by Loop Quantum Gravity (LQG), focusing on how LQG corrections and regularization parameters affect its properties. Building on the spherically symmetric and static black hole solution
Externí odkaz:
http://arxiv.org/abs/2408.08542
We find some exact solutions for constant-density and quark matter equations of state in stellar structure models framed within the $f(R,T)=R+\lambda \kappa^2 T$ theory of gravity, where $R$ is the curvature scalar, $T$ the trace of the stress-energy
Externí odkaz:
http://arxiv.org/abs/2407.06062
Publikováno v:
Phys.Rev.D 110 (2024) 8, 084051
Considering the so-called Ricci-based gravity theories, a family of extensions of General Relativity whose action is given by a non-linear function of contractions and products of the (symmetric part of the) Ricci tensor of an independent connection,
Externí odkaz:
http://arxiv.org/abs/2406.09526
Publikováno v:
Universe 2024, 10(6), 258
We study the space-time geometry generated by coupling a free scalar field with a non-canonical kinetic term to General Relativity in $(2+1)$ dimensions. After identifying a family of scalar Lagrangians that yield exact analytical solutions in static
Externí odkaz:
http://arxiv.org/abs/2404.14881
Autor:
Castillo-Felisola, Oscar, Grez, Bastian, Olmo, Gonzalo J., Orellana, Oscar, Gárate, José Perdiguero
The Polynomial Affine Gravity is an alternative gravitational model, where the interactions are mediated solely by the affine connection, instead of the metric tensor. In this paper, we explore the space of solutions to the field equations when the t
Externí odkaz:
http://arxiv.org/abs/2404.11703
Autor:
Magalhães, Renan B., Ribeiro, Gabriel P., Junior, Haroldo C. D. Lima, Olmo, Gonzalo J., Crispino, Luís C. B.
We show that the absence of unbounded algebraic curvature invariants constructed from polynomials of the Riemann tensor cannot guarantee the absence of strong singularities. As a consequence, it is not sufficient to rely solely on the analysis of suc
Externí odkaz:
http://arxiv.org/abs/2401.12779
AI-based image generation has continued to rapidly improve, producing increasingly more realistic images with fewer obvious visual flaws. AI-generated images are being used to create fake online profiles which in turn are being used for spam, fraud,
Externí odkaz:
http://arxiv.org/abs/2311.08577
Autor:
Magalhães, Renan B., Masó-Ferrando, Andreu, Bombacigno, Flavio, Olmo, Gonzalo J., Crispino, Luís C. B.
We construct a general class of modified Ellis wormholes, where one asymptotic Minkowski region is replaced by a bounded 2-sphere core, characterized by asymptotic finite areal radius. We pursue an in-depth analysis of the resulting geometry, outlini
Externí odkaz:
http://arxiv.org/abs/2310.03727
We investigate the time evolution of spherically symmetric boson stars in Palatini $f(\mathcal{R})$ gravity through Numerical Relativity computations. Employing a novel approach that establishes a correspondence between modified gravity with scalar m
Externí odkaz:
http://arxiv.org/abs/2309.14912
We consider the impact of Generalized Uncertainty Principle (GUP) effects on the Dymnikova regular black hole. The minimum length scale introduced by the GUP modifies the energy density associated with the gravitational source, referred to as the Dym
Externí odkaz:
http://arxiv.org/abs/2309.03920