A Local Void and the Accelerating Universe

Details A Local Void and the Accelerating Universe A Local Void and the Accelerating Universe

2000-11-27

arxiv.org/abs/astro-ph/0011484v3

Mon.Not.Roy.Astron.Soc.326:287,2001

Astronomy and Astrophysics

Astrophysics

6 pages with 4 figures. Mon. Not. RAS (accepted)

Scientific paper

10.1046/j.1365-8711.2001.04597.x

Corresponding to the recent observational claims that we are in a local void (an underdense region) on scales of 200 - 300 Mpc, the magnitude-redshift relation in a cosmological model with a local void is investigated. It is already evident that the accelerating behavior of high-z supernovae can be explained in this model, because the local void plays a role similar to the positive cosmological constant. In this paper the dependence of the behavior on the gaps of cosmological parameters in the inner (low-density) region and the outer (high-density) region, the radius of the local void, and the clumpiness parameter is studied and its implication is discussed.

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