f(R) gravity: scalar perturbations in the late Universe

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10290446" target="_blank" >RIV/00216208:11320/14:10290446 - isvavai.cz</a>

Alternative codes found

RIV/67985840:_____/14:00432124

Result on the web

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-3005-1" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-014-3005-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-3005-1" target="_blank" >10.1140/epjc/s10052-014-3005-1</a>

Result language

angličtina

Original language name

f(R) gravity: scalar perturbations in the late Universe

Original language description

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 gravitationalattraction 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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

European Physical Journal C

ISSN

1434-6044

e-ISSN

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Volume of the periodical

74

Issue of the periodical within the volume

8

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

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UT code for WoS article

000341288000001

EID of the result in the Scopus database

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