Reconstructing dark energy using distance-luminosity and baryonic oscillations data

Details Reconstructing dark energy using distance-luminosity and baryonic oscillations data Reconstructing dark energy using distance-luminosity and baryonic oscillations data

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..273f&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We briefly summarise and further discuss the observational implications of the model-independent scheme recently put forward by us for the reconstruction of dark energy. The scheme employs rather weak geometrical features of the luminosity-distance relation motivated by recent observations. Using the SNLS supernovae data, the reconstructed luminosity-distance curves best fitting the data are shown to favour a Universe with a varying dark energy density, expanding at a slower rate than the Λ CDM model. The Λ CDM model. however, cannot be ruled out at high significance levels, in line with other recent reconstructions. We highlight the degeneracy concerning the CDM density parameter Ωm_0, which acts as a barrier against a conclusive determination of whether the dark agency is the cosmological constant.

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