High-resolution temporal constraints on the dynamics of dark energy

Details High-resolution temporal constraints on the dynamics of dark energy High-resolution temporal constraints on the dynamics of dark energy

2007-12-14

arxiv.org/abs/0712.2277v2

Phys.Rev.D77:121302,2008

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures Version for PRD (Rapid Communications)

Scientific paper

10.1103/PhysRevD.77.121302

We use the recent type Ia supernova, cosmic microwave background and large-scale structure data to shed light on the temporal evolution of the dark energy equation of state $w(z)$ out to redshift one. We constrain the most flexible parametrization of dark energy to date, and include the dark energy perturbations consistently throughout. Interpreting our results via the principal component analysis, we find no significant evidence for dynamical dark energy: the cosmological constant model is consistent with data everywhere between redshift zero and one at 95% C.L.

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