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- W2003925933 abstract "We find that if we live at the center of an inhomogeneity with total density contrast of roughly 0.1, dark energy is not a cosmological constant at 95% confidence level. Observational constraints on the equation of state of dark energy, w, depend strongly on the local matter density around the observer. We model the local inhomogeneity with an exact spherically symmetric solution which features a pressureless matter component and a dark-energy fluid with constant equation of state and negligible sound speed, that reaches a homogeneous solution at finite radius. We fit this model to observations of the local expansion rate, distant supernovae and the cosmic microwave background. We conclude that the possible uncertainty from large-scale structure has to be taken into account if one wants to progress towards not just precision but also accurate cosmology." @default.
- W2003925933 created "2016-06-24" @default.
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- W2003925933 date "2013-03-12" @default.
- W2003925933 modified "2023-10-18" @default.
- W2003925933 title "Uncertainty on w from large-scale structure" @default.
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- W2003925933 doi "https://doi.org/10.1093/mnras/stt309" @default.
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