Local dark energy: HST evidence from the expansion flow around Cen A/M83 galaxy group

Details Local dark energy: HST evidence from the expansion flow around Cen A/M83 galaxy group Local dark energy: HST evidence from the expansion flow around Cen A/M83 galaxy group

2007-04-20

arxiv.org/abs/0704.2753v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1080/10556790701415393

A structure with a massive group in its center and a cool expansion outflow outside is studied around the Cen A galaxy with the use of the Hubble Space Telescope observations. It is demonstrated that the dynamics of the flow is dominated by the antigravity of the dark energy background. The density of dark energy in the cell is estimated to be near the global cosmological density. This agrees with our previous result from the neighborhood of the Local group. A notion of the ``Hubble cell'' is introduced as a building block of the local structure of the universe.

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