The understanding of stellar structure represents the crossroads of our theories of the
nuclear force and the gravitational interaction under the most extreme conditions observably …

The traditional presentation of Unimodular Gravity (UG) consists on indicating that it is an
alternative theory of gravity that restricts the generic diffeomorphism invariance of General …

Wormholes are tunnels connecting different regions in spacetime. They were obtained
originally as a solution for Einstein's General Theory of Relativity and according to this …

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 …

Wormholes are outstanding solutions of Einstein's General Relativity. They were worked out
in the late 1980s by Morris and Thorne, who have figured out a recipe that wormholes must …

Unimodular gravity is an appealing approach to address the cosmological constant problem.
In this scenario, the vacuum energy density of quantum fields does not gravitate and the …

In this work, we study the evolution of a spatially flat Universe by considering a viscous dark
matter and perfect fluids for dark energy and radiation, including an interaction term between …

Unimodular gravity is a modified theory with respect to general relativity by an extra
condition that the determinant of the metric is fixed. Especially, if the energy-momentum …

With the goal of studying the cosmological constant (CC) problem, we present an exhaustive
analysis of unimodular gravity as a possible candidate to resolve the CC origin and with this …

Unimodular gravity (UG) is often deemed comparable to General Relativity (GR) in many
respects, despite the theory exhibiting invariance under a more limited set of diffeomorphic …