J 2017

Cosmological Perturbations in Restricted f(R)-Gravity

KLUSOŇ, Josef, Masud CHAICHIIAN and Amir GHALEE

Basic information

Original name

Cosmological Perturbations in Restricted f(R)-Gravity

Name in Czech

Kosmologické poruchy v omezené f(R) gravitaci

Authors

KLUSOŇ, Josef (203 Czech Republic, guarantor, belonging to the institution), Masud CHAICHIIAN (246 Finland) and Amir GHALEE (364 Islamic Republic of Iran)

Edition

Physical review D, American Physical Society, 2017, 2470-0010

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10303 Particles and field physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 4.394

RIV identification code

RIV/00216224:14310/17:00095558

Organization unit

Faculty of Science

DOI

UT WoS

000406878300004

Keywords (in Czech)

Horavova-Lifsicova gravitaceů; kosmologicke poruchy

Keywords in English

Horava-Lifshitz gravity; Cosmological Perturbations

Tags

Tags

International impact, Reviewed
Změněno: 30/3/2018 20:31, Ing. Nicole Zrilić

Abstract

ORIG CZ

V originále

We investigate the metric perturbations of the restricted f(R) theory of gravity in the cosmological context and explore the phenomenological implications of this model. We show that it is possible to construct a restricted model of gravity, in which the background equations are the same as the equations of motion which are derived from the Einstein-Hilbert action with the cosmological constant term. We argue that the deviation from the Einstein-Hilbert model emerges in the perturbed equations, for which we have a nonvanishing anisotropic stress. Further, with the help of the results of Planck data for the modified gravity, we obtain constraints on the parameters of the model.

In Czech

Zkoumáme metrické poruchy omezené f(R) gravitace v kosmologickém kontextu a studujeme phenomonologické implikace tohoto modelu. Ukážeme, že je možné studovat tuto teorii, kdy rovnice pozadí jsou stejné, jako odvozené z Einstein Hilbertovy akce s kosmologickým členem, že pouze se odlišují na úrovni poruchového počtu.

Links

GBP201/12/G028, research and development project
Name: Ústav Eduarda Čecha pro algebru, geometrii a matematickou fyziku
Investor: Czech Science Foundation