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Phys. Rev. Lett. 101, 011301 (2008) [4 pages]

A General Test of the Copernican Principle

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Chris Clarkson1, Bruce Bassett1,2, and Teresa Hui-Ching Lu1
1Cosmology and Gravity Group, Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch 7701, South Africa
2South African Astronomical Observatory, Observatory, Cape Town, South Africa

Received 17 January 2008; published 2 July 2008

To date, there has been no general way of determining if the Copernican principle—that we live at a typical position in the Universe—is in fact a valid assumption, significantly weakening the foundations of cosmology as a scientific endeavor. Here we present an observational test for the Copernican assumption which can be automatically implemented while we search for dark energy in the coming decade. Our test is entirely independent of any model for dark energy or theory of gravity and thereby represents a model-independent test of the Copernican principle.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.011301
DOI:
10.1103/PhysRevLett.101.011301
PACS:
98.80.Es, 98.62.Py, 98.62.Qz