Geometric Perfect Fluids from Extended Gravity

Autor:	Capozziello, Salvatore, Mantica, Carlo Alberto, Molinari, Luca Guido
Rok vydání:	2022
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1209/0295-5075/ac525d
Popis:	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 in 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-Lema\^itre-Roberson-Walker metric. Comment: 7 pages, accepted for publication in Europhysics Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2201.08705 Zobrazit plný text záznamu View this record from Arxiv