300 citations · 2.6k across the 72 of their papers we have counts for
7 papers · 1 filter
Jebsen-Birkhoff theorem and its stability in f(R) gravity
Anne Marie Nzioki, Rituparno Goswami, Peter K. S. Dunsby
We prove a Jebsen-Birkhoff like theorem for f(R) theories of gravity in order to to find the necessary conditions required for the existence of the Schwarzschild solution in these…
On tidal forces in f(R) theories of gravity
Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby, Vinicius C. Busti +1
Despite the extraordinary attention that modified gravity theories have attracted over the past decade, the geodesic deviation equation in this context has not received proper form…
Backreaction mechanism in multifluid and extended cosmologies
Jose Beltran Jimenez, Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby +1
One possible explanation for the present observed acceleration of the Universe is the breakdown of homogeneity and isotropy due to the formation of non-linear structures. How inhom…
The 1+1+2 formalism for Scalar-Tensor gravity
Sante Carloni, Peter K S Dunsby
We use the 1+1+2 covariant approach to clarify a number of aspects of spherically symmetric solutions of non-minimally coupled scalar tensor theories. Particular attention is focus…
Perturbations of Kantowski-Sachs models with a cosmological constant
Zoltán Keresztes, Mats Forsberg, Michael Bradley +2
We investigate perturbations of Kantowski-Sachs models with a positive cosmological constant, using the gauge invariant 1+3 and 1+1+2 covariant splits of spacetime together with a…
Large Scale Structure Constraints for a Class of f(R) Theories of Gravity
Amare Abebe, Alvaro de la Cruz Dombriz, Peter K. S. Dunsby
Over the last few years much attention has been given to the study of modified gravity theories in order to find a more natural explanation for the late time acceleration of the Un…