4 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…
Topological regular black holes without Cauchy horizon
Marco Calzá, Massimiliano Rinaldi, Sergio Zerbini
Regular and spherically symmetric black holes that solve the singularity problems of the Schwarzschild solution are phenomenologically viable at large distance but usually suffer f…
How the Schwarzschild-de Sitter horizons remain in thermal equilibrium at vastly different temperatures
Marcello Miranda, Massimiliano Rinaldi, Valerio Faraoni
The Tolman-Ehrenfest criterion of thermal equilibrium for a static fluid in a static spacetime is generalized to stationary heat conduction, in the approximation in which backreact…
Black hole event horizons are cosmologically coupled
Valerio Faraoni, Massimiliano Rinaldi
It is shown that an exactly static and spherically symmetric black hole event horizon cannot be embedded in a time-dependent geometry. Forcing it to do so results in a naked null s…