Data di Pubblicazione:
2020
Citazione:
Cosmological perfect fluids in higher-order gravity / S. Capozziello, C.A. Mantica, L.G. Molinari. - In: GENERAL RELATIVITY AND GRAVITATION. - ISSN 0001-7701. - 52:4(2020 Apr), pp. 36.1-36.9. [10.1007/s10714-020-02690-2]
Abstract:
We prove that in Robertson–Walker space-times (and in generalized Robertson–Walker spacetimes of dimension greater than 3 with divergence-free Weyl tensor) all higher-order gravitational corrections of the Hilbert–Einstein Lagrangian density F(R, □ R, … , □ kR) have the form of perfect fluids in the field equations. This statement definitively allows to deal with dark energy fluids as curvature effects.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Cosmology; Higher-order gravity; Perfect fluids
Elenco autori:
S. Capozziello, C.A. Mantica, L.G. Molinari
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