$H(z)$ diagnostics on the nature of dark energy

Details $H(z)$ diagnostics on the nature of dark energy $H(z)$ diagnostics on the nature of dark energy

2011-03-28

arxiv.org/abs/1103.5492v1

Int.J.Mod.Phys.D20:561-579,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

22 pages, 7 figures. Accepted for publication in IJMPD

Scientific paper

10.1142/S0218271811018871

The two dominant components of the cosmic budget today, pressureles 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.

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