Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/09/025
Keywords
superclusters; cosmological parameters from CMBR; dark energy theory; cosmic flows
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It is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an apparent acceleration, even when any form of dark energy is absent. In this paper, we present a Minimal Void scenario, i.e. a void with minimal underdensity contrast (of about -0.4) and radius (similar to 200 -250 Mpc/h) that can, not only explain the supernovae data, but also be consistent with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements, and in particular consistency with local measurements of the Hubble parameter. We also point out possible observable signatures.
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