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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/67985840:_____/14:00432124

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

—

Svazek periodika

74

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000341288000001

EID výsledku v databázi Scopus

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