249 citations
- Université de SherbrookeCA3 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT2 papers
- Northeastern UniversityUS2 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT2 papers
- Swinburne University of TechnologyAU2 papers
- University of TriesteIT2 papers
- Academy of AthensGR1 paper
- Carnegie Mellon UniversityUS1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- Chinese Academy of SciencesCN1 paper
- Consejo Superior de Investigaciones CientíficasES1 paper
- Drexel UniversityUS1 paper
9 papers · 1 filter
Position and frequency shifts induced by massive modes of the gravitational wave background in alternative gravity
S. Bellucci, S. Capozziello, M. De Laurentis +1
Alternative theories of gravity predict the presence of massive scalar, vector, and tensor gravitational wave modes in addition to the standard massless spin~2 graviton of general…
What is the fate of a black hole embedded in an expanding universe?
Valerio Faraoni, Changjun Gao, Xuelei Chen +1
Within a large class of exact solutions of the Einstein equations describing a black hole embedded in a Friedmann universe it is shown that, under certain assumptions, only those w…
Extension of the EGS theorem to metric and Palatini f(R) gravity
Valerio Faraoni
By using the equivalence between metric and Palatini f(R) (or "modified") gravities with omega=0, -3/2 Brans-Dicke theories, it is shown that the Ehlers-Geren-Sachs theorem of gene…
f(R) gravity: successes and challenges
Valerio Faraoni
We review the state of the art of f(R) theories of gravity (in their various formulations), which have been proposed as an explanation of the cosmic acceleration alternative to dar…
Breakdown of the initial value formulation of scalar-tensor gravity and its physical meaning
Valerio Faraoni, Nicolas Lanahan-Tremblay
We revisit singularities of two distinct kinds in the Cauchy problem of general scalar-tensor theories of gravity (previously discussed in the literature), and of metric and Palati…
Palatini f(R) gravity as a fixed point
Valerio Faraoni
In the context of modified gravity, we point out how the Palatini version of these theories is singled out as a very special case corresponding to the unique fixed point of a trans…