Data di Pubblicazione:
2022
Citazione:
Geometric perfect fluids from Extended Gravity / S. Capozziello, C.A. Mantica, L.G. Molinari. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 137:1(2022 Jan), pp. 19001.1-19001.7. [10.1209/0295-5075/ac525d]
Abstract:
A main issue in cosmology and astrophysics is whether the dark sector phenomenology originates from particle physics, then requiring the detection of new fundamental components, or it can be addressed by modifying General Relativity. Extended Theories of Gravity are possible candidates aimed at framing dark energy and dark matter in a comprehensive geometric view. Considering the concept of perfect scalars, we show that the field equations of such theories naturally contain perfect fluid terms. Specific examples are developed for the Friedman - Lemaıtre - Roberson-Walker metric.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Extended gravity; Roberston-Walker spacetime; perfect scalar;
Elenco autori:
S. Capozziello, C.A. Mantica, L.G. Molinari
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