Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way

Kód výsledku v IS VaVaI

RIV/47813059:19240/11:#0003873 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1088/1475-7516/2011/09/018

DOI - Digital Object Identifier

10.1088/1475-7516/2011/09/018

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way

Popis výsledku v původním jazyce

Using the pseudo-Newtonian (RN) potential reflecting properties of the Schwarzschild-de Sitter spacetime, we estimate the influence of the repulsive cosmological constant Lambda similar to 1.3 x 10(-56)cm(-2) implied by recent cosmological tests onto themotion of both Small and Large Magellanic Clouds (SMC and LMC) in the gravitational field of the Milky Way. Considering detailed modelling of the gravitational field of the Galaxy disc, bulge and cold dark matter halo, the trajectories of SMC and LMC constructed for the PN potential with the cosmological constant are confronted to those given for Lambda = 0. In the realistic model of the extended cold dark matter halo its edge and related total mass are taken at typical values reflecting recent diversity in the total Galaxy mass estimates. In all cases, strong influence of the cosmological constant, on 10% level or higher, has been found for motion of both SMC and LMC. Inside the halo, the Newtonian part of the PN potential is exact en

Název v anglickém jazyce

Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way

Popis výsledku anglicky

Using the pseudo-Newtonian (RN) potential reflecting properties of the Schwarzschild-de Sitter spacetime, we estimate the influence of the repulsive cosmological constant Lambda similar to 1.3 x 10(-56)cm(-2) implied by recent cosmological tests onto themotion of both Small and Large Magellanic Clouds (SMC and LMC) in the gravitational field of the Milky Way. Considering detailed modelling of the gravitational field of the Galaxy disc, bulge and cold dark matter halo, the trajectories of SMC and LMC constructed for the PN potential with the cosmological constant are confronted to those given for Lambda = 0. In the realistic model of the extended cold dark matter halo its edge and related total mass are taken at typical values reflecting recent diversity in the total Galaxy mass estimates. In all cases, strong influence of the cosmological constant, on 10% level or higher, has been found for motion of both SMC and LMC. Inside the halo, the Newtonian part of the PN potential is exact en

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

LC06014: Centrum teoretické astrofyziky

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

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

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Svazek periodika

—

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

31

Strana od-do

018

Kód UT WoS článku

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EID výsledku v databázi Scopus

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