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  • In this paper we study scalar perturbations of the metric for nonlinear models. We consider the Universe at the late stage of its evolution and deep inside the cell of uniformity. We investigate the astrophysical approach in the case of Minkowski spacetime background and two cases in the cosmological approach, the large scalaron mass approximation and the quasi-static approximation, getting explicit expressions for scalar perturbations for both these cases. In the most interesting quasi-static approximation, the scalar perturbation functions depend on both the nonlinearity function and the scale factor . Hence, we can study the dynamical behavior of the inhomogeneities (e.g., galaxies and dwarf galaxies) including into consideration their gravitational attraction and the cosmological expansion, and also taking into account the effects of nonlinearity. Our investigation is valid for functions which have stable de Sitter points in future with respect to the present time, which is typical for the most popular models.
  • In this paper we study scalar perturbations of the metric for nonlinear models. We consider the Universe at the late stage of its evolution and deep inside the cell of uniformity. We investigate the astrophysical approach in the case of Minkowski spacetime background and two cases in the cosmological approach, the large scalaron mass approximation and the quasi-static approximation, getting explicit expressions for scalar perturbations for both these cases. In the most interesting quasi-static approximation, the scalar perturbation functions depend on both the nonlinearity function and the scale factor . Hence, we can study the dynamical behavior of the inhomogeneities (e.g., galaxies and dwarf galaxies) including into consideration their gravitational attraction and the cosmological expansion, and also taking into account the effects of nonlinearity. Our investigation is valid for functions which have stable de Sitter points in future with respect to the present time, which is typical for the most popular models. (en)
Title
  • f(R) gravity: scalar perturbations in the late Universe
  • f(R) gravity: scalar perturbations in the late Universe (en)
skos:prefLabel
  • f(R) gravity: scalar perturbations in the late Universe
  • f(R) gravity: scalar perturbations in the late Universe (en)
skos:notation
  • RIV/00216208:11320/14:10290446!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, S
http://linked.open...iv/cisloPeriodika
  • 8
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 17385
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/14:10290446
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • nonlinear models; cosmological perturbations; general relativity (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [7498AD599CA3]
http://linked.open...i/riv/nazevZdroje
  • European Physical Journal C
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 74
http://linked.open...iv/tvurceVysledku
  • Novák, Jan
  • Eingorn, Maxim
  • Zhuk, Alexander
http://linked.open...ain/vavai/riv/wos
  • 000341288000001
issn
  • 1434-6044
number of pages
http://bibframe.org/vocab/doi
  • 10.1140/epjc/s10052-014-3005-1
http://localhost/t...ganizacniJednotka
  • 11320
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