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319 papers · 1 filter
Covariant Tolman-Oppenheimer-Volkoff equations in Energy-Momentum Squared Gravity
Eduardo Bittencourt, Mariam Campbell, Peter K. S. Dunsby +1
We study static, spherically symmetric stellar configurations in an extended class of Energy--Momentum Squared Gravity using the covariant \(1+1+2\) semi-tetrad formalism. For perf…
Cosmological perturbations in Energy-Momentum Squared Gravity
Peter K. S. Dunsby, Maria-Alexia Caldis, Eduardo Bittencourt
We present a fully covariant and gauge-invariant analysis of linear cosmological perturbations in Energy-Momentum Squared Gravity. Working within the 1+3 formalism, we derive the e…
Power-Law Bounces in Gravity: Analysis of the Ekpyrosis and Accelerating Regimes
Saurya Das, Peter Dunsby, S. Shajidul Haque +1
We investigate the dynamics of the Friedmann-Lemaître-Robertson-Walker spacetime within the framework of gravity using a compact, model-independent dynamical systems approac…
Toward a realistic Buchdahl limit in f(R) theories of gravity
Raul Carpio Fernandez, Alvaro de la Cruz-Dombriz
The so-called Buchdahl limit is not yet fully understood in the context of theories of gravity beyond the Einsteinian framework. In this investigation, we generalize this limit for…
Vector wormholes as conduits for matter interaction
Nailya Ganiyeva, Bruno J. Barros, Álvaro de la Cruz-Dombriz +1
In this work, we focus on the dynamics of a massive one-form field, \textbf{B}, often referred to simply as a vector field, that is minimally coupled to standard Einstein gravity.…
On the interactions and equilibrium between Einstein-Maxwell-Dilaton black holes
Ulrich K. Beckering Vinckers, Tomas Ortin
We study the interactions and the conditions for the equilibrium of forces between generic non-rotating black holes of the Einstein-Maxwell-Dilaton (EMD) theory. We study known (an…