Junction conditions and thin shells in perfect-fluid gravity

JL Rosa - Physical Review D, 2021 - APS
In this work we derive the junction conditions for the matching between two spacetimes at a
separation hypersurface in the perfect-fluid version of f (R, T) gravity, not only in the usual …

Junction conditions in Palatini f (R) gravity

GJ Olmo, D Rubiera-Garcia - Classical and Quantum Gravity, 2020 - iopscience.iop.org
We work out the junction conditions for f (R) gravity formulated in metric-affine (Palatini)
spaces using a tensor distributional approach. These conditions are needed for building …

Energy-Momentum Squared Gravity: A Brief Overview

RAC Cipriano, N Ganiyeva, T Harko, FSN Lobo… - arXiv preprint arXiv …, 2024 - arxiv.org
In this work, we present a review of Energy-Momentum Squared Gravity (EMSG)--more
specifically, $ f (R, T_ {\mu\nu} T^{\mu\nu}) $ gravity, where $ R $ represents the Ricci scalar …

Double gravitational layer traversable wormholes in hybrid metric-Palatini gravity

JL Rosa - Physical Review D, 2021 - APS
In this work, we explore the existence of traversable wormhole solutions supported by
double gravitational layer thin shells and satisfying the null energy condition (NEC) …

Non-exotic traversable wormholes in f R, T ab T ab gravity

J Luís Rosa, N Ganiyeva, FSN Lobo - The European Physical Journal C, 2023 - Springer
In this work we analyze traversable wormhole spacetimes in the framework of a covariant
generalization of Einstein's General Relativity known as energy–momentum squared gravity …

Junction conditions for generalized hybrid metric-Palatini gravity with applications

JL Rosa, JPS Lemos - Physical Review D, 2021 - APS
The generalized hybrid metric-Palatini gravity is a theory of gravitation that has an action
composed of a Lagrangian given by f (R, R), where f is a function of the metric Ricci scalar R …

Junction conditions of Palatini gravity

JL Rosa, D Rubiera-Garcia - Physical Review D, 2022 - APS
We work out the junction conditions for the Palatini f (R, T) extension of general relativity,
where f is an arbitrary function of the curvature scalar R of an independent connection, and …

Mass-radius relation for neutron stars in gravity: A comparison between purely metric and torsion formulations

P Feola, XJ Forteza, S Capozziello, R Cianci, S Vignolo - Physical Review D, 2020 - APS
Within the framework of f (R)= R+ α R 2 gravity, we study realistic models of neutron stars,
using equations of state compatible with the LIGO constraints, ie, APR4, MPA1, SLy, and …

Junction conditions in bi-scalar Poincaré gauge gravity

A Casado-Turrión, Á de la Cruz-Dombriz… - … of Cosmology and …, 2023 - iopscience.iop.org
In this work, we study the junction conditions of the ghost-free subclass of quadratic
Poincaré Gauge gravity, which propagates one scalar and one pseudo-scalar. For this …

[PDF][PDF] Junction conditions for general LRS spacetimes in the 1+ 1+ 2 covariant formalism

JL Rosa, S Carloni - arXiv preprint arXiv:2303.12457, 2023 - researchgate.net
When dealing with astrophysically and cosmologically relevant spacetimes in the context of
general relativity, one often faces the problem that such spacetimes cannot be represented …