Presently decaying dark energy?

Investigation of dark energy (DE) properties using the largest existing Constitution supernovae sample including recent CfA data for small redshifts and omitting the assumption of a constant equation of state w for DE reveals a slight inconsistency (more than 1σ) with the standard spatially flat LCD...

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Bibliographic Details
Published in:Annalen der Physik 2010-04, Vol.19 (3-5), p.316-319
Main Authors: Shafieloo, A., Sahni, V., Starobinsky, A.A.
Format: Article
Language:English
Subjects:
Cosmology
dark energy
parameter estimation
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Summary:Investigation of dark energy (DE) properties using the largest existing Constitution supernovae sample including recent CfA data for small redshifts and omitting the assumption of a constant equation of state w for DE reveals a slight inconsistency (more than 1σ) with the standard spatially flat LCDM model. The effect which is most clearly seen using the recently introduced Om diagnostic corresponds to an increase of both this diagnostic and w at redshifts z
ISSN:0003-3804
1521-3889
DOI:10.1002/andp.201010436