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Browsing Faculty of Natural and Agricultural Sciences by Subject "Cosmological perturbations"
Now showing items 1-2 of 2
(MDPI, 2018)The lightcone gauge is a set of what are called the observational coordinates adapted to our past lightcone. We develop this gauge by producing a perturbed spacetime metric that describes the geometry of our past lightcone ...
(Springer, 2016)We study a class of shear-free, homogeneous but anisotropic cosmological models with imperfect matter sources in the context of f(R) gravity. We show that the anisotropic stresses are related to the electric part of the ...