Cosmological fluids in the equivalence between Rastall and Einstein gravity
General Relativity and Quantum Cosmology
2023-03-08 v1 Cosmology and Nongalactic Astrophysics
Abstract
Rastall gravity is a modified gravity proposal that incorporates a non-conserved energy momentum tensor (EMT). We study the equivalence between Rastall gravity and general relativity, analyzing its consequences for an EMT of dark matter and dark energy. We find that the translation between the Rastall and Einstein interpretations modifies the equation of state for each component. For instance, cold dark matter can translate into warm dark matter. If the EMT components are allowed to interact, the translation also changes the type of interaction between the components.
Cite
@article{arxiv.2303.04009,
title = {Cosmological fluids in the equivalence between Rastall and Einstein gravity},
author = {Javier Chagoya and López-Domínguez and C. Ortiz},
journal= {arXiv preprint arXiv:2303.04009},
year = {2023}
}
Comments
18 pages, 4 figures