Energy Conditions and Supernovae Observations

Abstract

In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-Walker approach to cosmological modelling where the equation of state of the cosmological fluid is unknown, the energy conditions provide model-independent bounds on the behavior of the distance modulus of cosmic sources as a function of the redshift. We use both the gold and the legacy samples of current type Ia supenovae to carry out a model-independent analysis of the energy conditions violation in the context of standard cosmology.

4 pages, 2 figures; v2: References added, misprints corrected, published in Phys.Rev.D in the present form

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• Cosmodynamics: Energy conditions, Hubble bounds, density bounds, time and distance bounds
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• Bounding the Hubble flow in terms of the w parameter