About: Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way     Goto   Sponge   NotDistinct   Permalink

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  • 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 the motion 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 enough, while outside the halo the PN potential can give relevant relativistic corrections. The role of the cosmological constant is most conspicuous when binding mass is estimated for the satellite galaxies. We have found a strong influence of cosmic repulsion on the total binding mass for both galaxies. For SMC there is the binding mass M(SMC)(Lambda=0) = 7.07 x 10(11) M(circle dot) and M(SMC)(Lambda>0) = 8.61 x 10(11) M(circle dot), while even much higher increase is found for LMC, where M(LMC)(Lambda=0) = 1.50 x 10(12) M(circle dot) and M(LMC)(Lambda>0) = 2.21 x 10(12) M(circle dot), putting serious doubts on the possibility that the LMC is bounded by the Milky Way. However, the estimates of binding masses are strongly influenced by initial velocity of SMC and LMC; we took the values inferred for the IAU MW rotation velocity similar to 220 km/s.
  • 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 the motion 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 enough, while outside the halo the PN potential can give relevant relativistic corrections. The role of the cosmological constant is most conspicuous when binding mass is estimated for the satellite galaxies. We have found a strong influence of cosmic repulsion on the total binding mass for both galaxies. For SMC there is the binding mass M(SMC)(Lambda=0) = 7.07 x 10(11) M(circle dot) and M(SMC)(Lambda>0) = 8.61 x 10(11) M(circle dot), while even much higher increase is found for LMC, where M(LMC)(Lambda=0) = 1.50 x 10(12) M(circle dot) and M(LMC)(Lambda>0) = 2.21 x 10(12) M(circle dot), putting serious doubts on the possibility that the LMC is bounded by the Milky Way. However, the estimates of binding masses are strongly influenced by initial velocity of SMC and LMC; we took the values inferred for the IAU MW rotation velocity similar to 220 km/s. (en)
Title
  • Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way
  • Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way (en)
skos:prefLabel
  • Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way
  • Influence of the cosmological constant on the motion of Magellanic Clouds in the gravitational field of Milky Way (en)
skos:notation
  • RIV/47813059:19240/11:#0003873!RIV12-MSM-19240___
http://linked.open...avai/predkladatel
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(LC06014), Z(MSM4781305903)
http://linked.open...iv/cisloPeriodika
  • 9
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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  • 204626
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  • RIV/47813059:19240/11:#0003873
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  • gravity, galaxy dynamics (en)
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  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [89047F0F4B29]
http://linked.open...i/riv/nazevZdroje
  • JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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http://linked.open...iv/tvurceVysledku
  • Stuchlík, Zdeněk
  • Schee, Jan
http://linked.open...n/vavai/riv/zamer
issn
  • 1475-7516
number of pages
http://bibframe.org/vocab/doi
  • 10.1088/1475-7516/2011/09/018
http://localhost/t...ganizacniJednotka
  • 19240
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