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- W1738491121 abstract "Recently, we have derived a novel and compact expression for how perturbations in the matter fields of the cosmological fluid can lead to deviations from the standard Friedmann equations. Remarkably, the dissipative damping of velocity perturbations by bulk and shear viscosity in the dark sector can modify the expansion history of the universe on arbitrarily large scales. In universes in which this effect is sufficiently sizeable, it could account for the acceleration of the cosmological expansion. But even if dark matter should be less viscous and if the effect would be correspondingly smaller, it may have observable consequences in the era of precision cosmology. Here, we review the origin of this backreaction effect and possibilities to constrain it further." @default.
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- W1738491121 date "2015-06-01" @default.
- W1738491121 modified "2023-09-27" @default.
- W1738491121 title "Backreaction effects on the matter side of Einstein's field equations" @default.
- W1738491121 hasPublicationYear "2015" @default.
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