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- W2030671005 abstract "We argue that there is an intrinsic noise on measurements of the equation of state parameter $w=p/rho$ from large-scale structure around us. The presence of the large-scale structure leads to an ambiguity in the definition of the background universe and thus there is a maximal precision with which we can determine the equation of state of dark energy. To study the uncertainty due to local structure, we model density perturbations stemming from a standard inflationary power spectrum by means of the exact Lema^{i}tre-Tolman-Bondi solution of Einstein's equation, and show that the usual distribution of matter inhomogeneities in a $Lambda$CDM cosmology causes a variation of $w$ -- as inferred from distance measures -- of several percent. As we observe only one universe, or equivalently because of the cosmic variance, this uncertainty is systematic in nature." @default.
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- W2030671005 date "2013-12-01" @default.
- W2030671005 modified "2023-09-26" @default.
- W2030671005 title "Intrinsic uncertainty on the nature of dark energy" @default.
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- W2030671005 doi "https://doi.org/10.1016/j.dark.2014.01.001" @default.
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