Speaker
Valerio Faraoni
Description
With insight from examples and physical arguments, the Tolman-Ehrenfest
criterion of thermal equilibrium for test fluids in static spacetimes is
extended to local thermal equilibrium in conformally static geometries.
The temperature of the conformally rescaled fluid scales with the inverse
of the conformal factor, reproducing the evolution of the cosmic microwave
background in Friedmann universes, the Hawking temperature of the
Sultana-Dyer cosmological black hole, and a heuristic argument by Dicke.
[Based on V. Faraoni and R. Vanderwee 2023, Phys. Rev. D 107, 06407 (arXiv:2301.09021)]
| Keyword-1 | Thermal equilibrium |
|---|---|
| Keyword-2 | General Relativity |
| Keyword-3 | Conformally static spacetime |
Primary author
Valerio Faraoni
