\(H(z)\) diagnostics on the nature of dark energy. (English) Zbl 1217.85016
Summary: The two dominant components of the cosmic budget today, pressureless matter and dark energy, may or may not be interacting with each other. Currently, both possibilities appear compatible with observational data. We propose several criteria based on the history of the Hubble factor that can help discern whether they are interacting and whether dark energy is phantom or quintessence in nature.
MSC:
| 85A40 | Astrophysical cosmology |
| 83F05 | Relativistic cosmology |
| 83C55 | Macroscopic interaction of the gravitational field with matter (hydrodynamics, etc.) |
| 85A30 | Hydrodynamic and hydromagnetic problems in astronomy and astrophysics |
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