Model-Independent Reconstruction of the Expansion History of the Universe from Type Ia Supernovae

Details Model-Independent Reconstruction of the Expansion History of the Universe from Type Ia Supernovae Model-Independent Reconstruction of the Expansion History of the Universe from Type Ia Supernovae

2011-09-05

arxiv.org/abs/1109.0873v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 8 figures, to be published in Montly Notices of the Royal Astronomical Society

Scientific paper

Based on the largest homogeneously reduced set of Type Ia supernova luminosity data currently available -- the Union2 sample -- we reconstruct the expansion history of the Universe in a model-independent approach. Our method tests the geometry of the Universe directly without reverting to any assumptions made on its energy content. This allows us to constrain Dark Energy models and non-standard cosmologies in a straightforward way. The applicability of the presented method is not restricted to testing cosmological models. It can be a valuable tool for pointing out systematic errors hidden in the supernova data and planning future Type Ia supernova cosmology campaigns.

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