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- Université de SherbrookeCA5 papers
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9 papers · 2 filters
Comments on "Solar System constraints to general f(R) gravity"
Valerio Faraoni, Nicolas Lanahan-Tremblay
We comment on, and complete, the analysis of the weak field limit of metric f(R) gravity in T. Chiba, T.L. Smith, and A.L. Erickcek, Phys. Rev. D 75, 124014 (2007).
The Hawking temperature of expanding cosmological black holes
Valerio Faraoni
In the context of a debate on the correct expression of the Hawking temperature of an expanding cosmological black hole, we show that the correct expression in terms of the Hawking…
The Cauchy problem of f(R) gravity
Nicolas Lanahan-Tremblay, Valerio Faraoni
The initial value problem of metric and Palatini f(R)gravity is studied by using the dynamical equivalence between these theories and Brans-Dicke gravity. The Cauchy problem is wel…
A viability criterion for modified gravity with an extra force
Valerio Faraoni
A recently proposed theory of modified gravity with an explicit ``anomalous'' coupling of the Ricci curvature to matter is discussed, and an inequality is derived which expresses a…
Cosmological expansion and local physics
Valerio Faraoni, Audrey Jacques
The interplay between cosmological expansion and local attraction in a gravitationally bound system is revisited in various regimes. First, weakly gravitating Newtonian systems are…
The phase space view of f(R) gravity
Jose C. C. de Souza, Valerio Faraoni
We study the geometry of the phase space of spatially flat Friedmann-Lemaitre-Robertson-Walker models in f(R) gravity, for a general form of the function f(R). The equilibrium poin…