Impact of cosmic inhomogeneities on SNe observations

Details Impact of cosmic inhomogeneities on SNe observations Impact of cosmic inhomogeneities on SNe observations

2009-11-30

arxiv.org/abs/0911.5584v1

AIP Conf.Proc.1241:1043-1050,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 6 figures; to be published in the AIP proceedings of the 'Invisible Universe International Conference', UNESCO-Paris,

Scientific paper

10.1063/1.3462598

We study the impact of cosmic inhomogeneities on the interpretation of SNe observations. We build an inhomogeneous universe model that can confront supernova data and yet is reasonably well compatible with the Copernican Principle. Our model combines a relatively small local void, that gives apparent acceleration at low redshifts, with a meatball model that gives sizeable lensing (dimming) at high redshifts. Together these two elements, which focus on different effects of voids on the data, allow the model to mimic the concordance model.

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