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15 papers · 2 filters
Stellar Structure Equations in Extended Palatini Gravity
Gonzalo J. Olmo, Helios Sanchis-Alepuz, Swapnil Tripathi
We consider static spherically symmetric stellar configurations in Palatini theories of gravity in which the Lagrangian is an unspecified function of the form .…
On the uniqueness of the space-time energy in General Relativity. The illuminating case of the Schwarzschild metric
Ramon Lapiedra, Juan Antonio Morales-Lladosa
The case of asymptotic Minkowskian space-times is considered. A special class of asymptotic rectilinear coordinates at the spatial infinity, related to a specific system of free fa…
Black hole formation from a null fluid in extended Palatini gravity
J. Martinez-Asencio, Gonzalo J. Olmo, D. Rubiera-Garcia
We study the formation and perturbation of black holes by null fluxes of neutral matter in a quadratic extension of General Relativity formulated a la Palatini. Working in a spheri…
Wormholes supported by hybrid metric-Palatini gravity
Salvatore Capozziello, Tiberiu Harko, Tomi S. Koivisto +2
Recently, a modified theory of gravity was presented, which consists of the superposition of the metric Einstein-Hilbert Lagrangian with an term constructed à la Palati…
Cosmology of hybrid metric-Palatini f(X)-gravity
Salvatore Capozziello, Tiberiu Harko, Tomi S. Koivisto +2
A new class of modified theories of gravity, consisting of the superposition of the metric Einstein-Hilbert Lagrangian with an term constructed à la Palatini was propos…
Reissner-Nordström black holes in extended Palatini theories
Gonzalo J. Olmo, D. Rubiera-Garcia
We study static, spherically symmetric solutions with an electric field in an extension of general relativity (GR) containing a Ricci-squared term and formulated in the Palatini fo…