期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 326, 期 1, 页码 287-292出版社
OXFORD UNIV PRESS
DOI: 10.1046/j.1365-8711.2001.04597.x
关键词
cosmology : observations; large-scale structure of Universe
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 behaviour 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 behaviour 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 implications are discussed.
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