301 citations · 2.1k across the 77 of their papers we have counts for
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Nonconservative unimodular gravity: Gravitational waves
Júlio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda +1
Unimodular gravity is characterized by an extra condition with respect to General Relativity: the determinant of the metric is constant. This extra condition leads to a more restri…
Nonconservative unimodular gravity: a viable cosmological scenario
Júlio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda +1
In this work we review the issue of imposing the conservation of the energy-momentum tensor as a necessary condition to recover the equivalence between the unimodular gravity and G…
Remarks on the black hole shadows in Kerr-de Sitter space times
Eunice Omwoyo, Humberto Belich, Júlio C. Fabris +1
This work is geared towards analysis of shadows cast by Kerr-de Sitter (KdS) and Kerr-de Sitter Revisited (RKdS) black holes. Considering observers in the vicinity of the static ra…
Stellar structure in a Newtonian theory with variable
Júlio C. Fabris, Túlio Ottoni, Júnior D. Toniato +1
A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed. For static configurations the gravitational coupling acquires an intrinsic…
Early-time thermalization of cosmic components? A hint for solving cosmic tensions
Hermano Velten, Ingrid Costa, Winfried Zimdahl
We study an expanding two-fluid model of non-relativistic dark matter and radiation which are allowed to interact during a certain time span and to establish an approximate thermal…
To conserve, or not to conserve: A review of nonconservative theories of gravity
Hermano Velten, Thiago R. P. Caramês
Apart from the familiar structure firmly-rooted in the general relativistic field equations where the energy--momentum tensor has a null divergence i.e., it conserves, there exists…