About the cosmological constant in geometric scalar theory of gravity

Autor:	Jardim, I. C., Landim, R. R.
Rok vydání:	2015
Předmět:	General Relativity and Quantum Cosmology High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	In this paper we study how to include the cosmological constant in geometric scalar theory of gravity (GSG). Firstly we show that the cosmological constant could not be modeled by a matter field, unlike in General Relativity. We also show that a spherically symmetric matter distribution, over the de Sitter vacuum, does not produce the Kottler solution and no black hole. To circumvent this problem we introduce an coupling term between the scalar field and the vacuum curvature in way to provide the Kottler solution. We also apply the original (GSGI) and the modified (GSGII) geometric scalar theory of gravity to the Friedmann-Robertson-Walker cosmology. A numerical analysis indicates that GSGII is most sensible to the cosmological constant them GSGI. Comment: 9 pages, 4 figures. minor corrections in sec. III
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1508.02665 Zobrazit plný text záznamu View this record from Arxiv