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EAS Publications Series, Vol. 36 (30 May 2009), pp. 161-166, doi:10.1051/eas/0936023 Key: citeulike:3810993
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The standard model of cosmology suggests the existence of two components, "dark matter" and "dark energy", which determine the fate of the Universe. Their nature is still under investigation, and no direct proof of their existences has emerged yet. There exist alternative models which reinterpret the cosmological observations, for example by replacing the dark energy/dark matter hypothesis by the existence of a unique dark component, the dark fluid, which is able to mimic the behaviour of both components. After a quick review of the cosmological constraints on this unifying dark fluid, we will present a model of dark fluid based on a complex scalar field and discuss the problem of the choice of the potential.
As with many articles on Dark Energy, this one also suggests that there is still much unknown about what dark energy and dark matter truly is. This article uses a quantitative method to investigate the possibility of dark energy and dark matter being one and the same single component that is inhomogeneous--a dark fluid. The article discusses the use of a theoretical gas called Chaplygin gas. This gas is supposed to behave as both dark energy and dark matter do, but different parts of the gas act as dark energy on the cosmological scale, while other parts act as dark matter on a local scale. It uses the concept of a scalar field which I understand to mean that at any given point of reference, all observations made about something will be the same by anyone who uses the same criteria. The study shows that this unifying theory is possible using a scalar field and the type of gas used in the research. There were problems however, with the computations in quantum physics that left a point of uncertainty. Overall the research did support the question enough to say there was potential of a single fluid that acts both as dark energy and dark matter just as long as it is inhomogeneous.
This article relates to our question in that it is presenting a different approach to the existence of dark energy. It does not claim to 100% identify what it is, but by using a unifying substance it presented a decent hypothesis that was backed by data. The research is not complete as the authors suggest, but it does open a pathway for future investigation into this theory. I think it will provide scientific support for dark energy, and will add to the research of our question.
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