A new formalism is derived for linear perturbations around an averaged cosmological background that treats backreaction effects as an effective perfect fluid, with applications showing impacts on structure growth in observationally fitted models.
Koksbang,Observations in statistically homogeneous, locally inhomogeneous cosmological toy models without FLRW backgrounds,Mon
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Cosmological perturbations on an averaged background
A new formalism is derived for linear perturbations around an averaged cosmological background that treats backreaction effects as an effective perfect fluid, with applications showing impacts on structure growth in observationally fitted models.