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Título
Dynamics of non-minimally coupled perfect fluids
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Journal of Cosmology and Astroparticle Physics
Número de la revista
08
Datos de la obra
Bettoni, D., & Liberati, S. (2015). Dynamics of non-minimally coupled perfect fluids. Journal of Cosmology and Astroparticle Physics, 2015(08), 023.
Editor
IOP
Fecha
2015-08-13
Abstract
[EN] We present a general formulation of the theory for a non-minimally coupled perfect fluid in which both conformal and disformal couplings are present. We discuss how such non-minimal coupling is compatible with the assumptions of a perfect fluid and derive both the Einstein and the fluid equations for such model. We found that, while the Euler equation is significantly modified with the introduction of an extra force related to the local gradients of the curvature, the continuity equation is unaltered, thus allowing for the definition of conserved quantities along the fluid flow. As an application to cosmology and astrophysics we compute the effects of the non-minimal coupling on a Friedmann-Lemaȋtre-Robertson-Walker metric at both background and linear perturbation level and on the Newtonian limit of our theory.
Materia
Palabras clave
Peer review
SI
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DOI
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