The maximum sizes of large scale structures in alternative theories of gravity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00502244" target="_blank" >RIV/68378271:_____/17:00502244 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1475-7516/2017/07/018" target="_blank" >http://dx.doi.org/10.1088/1475-7516/2017/07/018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1475-7516/2017/07/018" target="_blank" >10.1088/1475-7516/2017/07/018</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The maximum sizes of large scale structures in alternative theories of gravity

Popis výsledku v původním jazyce

The maximum size of a cosmic structure is given by the maximum turnaround radius—the scale where the attraction due to its mass is balanced by the repulsion due to dark energy. We derive generic formulae for the estimation of the maximum turnaround radius in any theory of gravity obeying the Einstein equivalence principle, in two situations: on a spherically symmetric spacetime and on a perturbed Friedman-Robertson-Walker spacetime. We show that the two formulae agree. As an application of our formula, we calculate the maximum turnaround radius in the case of the Brans-Dicke theory of gravity. We find that for this theory, such maximum sizes always lie above the ΛCDM value, by a factor 1 + 1/3ω, where ω >> 1 is the Brans-Dicke parameter, implying consistency of the theory with current data.

Název v anglickém jazyce

The maximum sizes of large scale structures in alternative theories of gravity

Popis výsledku anglicky

The maximum size of a cosmic structure is given by the maximum turnaround radius—the scale where the attraction due to its mass is balanced by the repulsion due to dark energy. We derive generic formulae for the estimation of the maximum turnaround radius in any theory of gravity obeying the Einstein equivalence principle, in two situations: on a spherically symmetric spacetime and on a perturbed Friedman-Robertson-Walker spacetime. We show that the two formulae agree. As an application of our formula, we calculate the maximum turnaround radius in the case of the Brans-Dicke theory of gravity. We find that for this theory, such maximum sizes always lie above the ΛCDM value, by a factor 1 + 1/3ω, where ω >> 1 is the Brans-Dicke parameter, implying consistency of the theory with current data.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Cosmology and Astroparticle Physics

ISSN

1475-7516

e-ISSN

—

Svazek periodika

2017

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

—

Kód UT WoS článku

000406420500008

EID výsledku v databázi Scopus

2-s2.0-85027343723