Cosmological apparent and trapping horizons
arXiv:1106.4427 · doi:10.1103/PhysRevD.84.024003
Abstract
The dynamics of particle, event, and apparent horizons in FLRW space are discussed. The apparent horizon is trapping when the Ricci curvature is positive. This simple criterion coincides with the condition for the Kodama-Hayward apparent horizon temperature to be positive, and also discriminates between timelike and spacelike character of the apparent horizon. We discuss also the entropy of apparent cosmological horizons in extended theories of gravity and we use the generalized 2nd law to discard an exact solution of Brans-Dicke gravity as unphysical.
18 pages, 2 tables, no figures, to appear in Phys. Rev. D
References in corpus (19)
- Thermodynamic Behavior of Friedmann Equation at Apparent Horizon of FRW Universe
- Unified First Law and Thermodynamics of Apparent Horizon in FRW Universe
- Friedmann Equations of FRW Universe in Scalar-tensor Gravity, f(R) Gravity and First Law of Thermodynamics
- Hawking Radiation of Apparent Horizon in a FRW Universe
- Thermodynamical Properties of Apparent Horizon in Warped DGP Braneworld
- Corrected Entropy-Area Relation and Modified Friedmann Equations
- The (pseudo)issue of the conformal frame revisited
- Deep Connection Between Thermodynamics and Gravity in Gauss-Bonnet Braneworld
- Thermodynamics of Apparent Horizon in Brane World Scenario
- Dynamical surface gravity
- Thermodynamics of Apparent Horizon in Brane World Scenarios
- Theory of gravitation theories: a no-progress report
- Black hole entropy in modified gravity models
- Black holes and black hole thermodynamics without event horizons
- Thermodynamical properties of dark energy
- Chemical Potential and the Nature of the Dark Energy: The case of phantom
- The spatial relation between the event horizon and trapping horizon
- Cosmological Evolution Across Phantom Crossing and the Nature of the Horizon
- Interacting Three Fluid System and Thermodynamics of the Universe Bounded by the Event Horizon