6533b823fe1ef96bd127f6bd
RESEARCH PRODUCT
Local thermal equilibrium and ideal gas Stephani universes
Joan Josep FerrandoBartolomé Collsubject
Thermal equilibriumPhysicsTheoretical physicsExact solutions in general relativityPhysics and Astronomy (miscellaneous)Internal energyFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]First orderIdeal gasGeneral Relativity and Quantum Cosmologydescription
The Stephani universes that can be interpreted as an ideal gas evolving in local thermal equilibrium are determined. Five classes of thermodynamic schemes are admissible, which give rise to five classes of regular models and three classes of singular models. No Stephani universes exist representing an exact solution to a classical ideal gas (one for which the internal energy is proportional to the temperature). But some Stephani universes may approximate a classical ideal gas at first order in the temperature: all of them are obtained. Finally, some features about the physical behavior of the models are pointed out.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-03-01 |