In a previous paper we showed that static spherically symmetric objects which, in the vicinity of their surface, are well described by a polytropic equation of state with 3/2 < < 2 exhibit a curvature singularity in Palatini f(R) gravity. We argued that this casts serious doubt on the validity of Palatini f(R) gravity as a viable alternative to general relativity. In the present paper, we further investigate this characteristic of Palatini f(R) gravity in order to clarify its physical interpretation and consequences.
|Titolo:||Curvature singularities, tidal forces and the viability of Palatini f(R) gravity|
|Autori:||BARAUSSE E; SOTIRIOU T.P; MILLER J|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||10.1088/0264-9381/25/10/105008|
|Appare nelle tipologie:||1.1 Journal article|