13 papers
Black holes become comoving with the universe
Valerio Faraoni, Massimiliano Rinaldi
Previously, it was shown that static black hole event horizons cannot exist in time-dependent backgrounds without becoming naked singularities. In light of this, we are left with t…
New interpretation of the Minkowski limit of gravity
Valerio Faraoni, Luca Gallerani, Alain Maltais-Gosselin +2
It is well-established that the Minkowski limit of pure gravity breaks down, unlike that of full Starobinsky theory . We provide a novel interpretation of…
Towards a causal effective thermodynamics of scalar-tensor gravity
Narayan Banerjee, Andrea Giusti, Valerio Faraoni +2
The thermal analogy between the effective fluid of scalar-tensor gravity and Eckart's irreversible thermodynamics is extended to the causal Israel-Stewart model, adopting the minim…
Laboratory rivers extremize friction and are cosmological analogues
Valerio Faraoni, Nikki Veilleux
In the shallow water approximation, the cross-sectional profiles of laboratory rivers satisfy a differential equation here shown to be formally the Friedmann equation of cosmology…
The thermal view of cosmology
Valerio Faraoni, Santiago Novoa Cattivelli
A new thermal view of scalar-tensor gravity, in which general relativity is the zero-temperature state of gravity, is applied to the specific subclass of gravity theories an…
The thermal view of singularity-free scalar-tensor spacetimes
Valerio Faraoni, Nikki Veilleux
The two-parameter inhomogeneous and time-dependent Pimentel solution of Brans-Dicke theory is analyzed to probe and extend the new thermal view in which General Relativity is the z…