RECONSTRUCTING THE HISTORY OF ENERGY CONDITION VIOLATION FROM OBSERVATIONAL DATA

We study the likelihood of energy condition violations in the history of the universe. Our method is based on a set of functions that characterize energy condition violation. Friedmann-Lemaitre-Robertson-Walker cosmological models are built around these "indication functions." By computing...

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Bibliographic Details
Published in:The Astrophysical journal 2012-07, Vol.753 (2), p.1-9
Main Authors: WU, Chao-Jian, CONG MA, ZHANG, Tonci-Jie
Format: Article
Language:English
Subjects:
Astronomy
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
COSMOLOGY
Dark energy
Earth, ocean, space
EVOLUTION
Exact sciences and technology
GRAVITATION
Indication
Mathematical analysis
Mathematical models
MATRICES
NONLUMINOUS MATTER
RED SHIFT
RELATIVISTIC RANGE
UNIVERSE
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Summary:We study the likelihood of energy condition violations in the history of the universe. Our method is based on a set of functions that characterize energy condition violation. Friedmann-Lemaitre-Robertson-Walker cosmological models are built around these "indication functions." By computing the Fisher matrix of model parameters using Type Ia supernova and Hubble parameter data, we extract the principal modes of these functions' redshift evolution. These modes allow us to obtain general reconstructions of energy condition violation history independent of the dark energy model. We find that the data suggest a history of strong energy condition violation, but the null and dominant energy conditions are likely to be fulfilled. Implications for dark energy models are discussed.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/753/2/97