Probing dark energy with the CMB: projected constraints from WMAP and Planck

Details Probing dark energy with the CMB: projected constraints from WMAP and Planck Probing dark energy with the CMB: projected constraints from WMAP and Planck

2003-01-11

arxiv.org/abs/astro-ph/0301192v3

Astrophys.J. 588 (2003) L5-L8

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Matches version accepted by ApJL. Figures may also be downloaded at http://www.sissa.it/~bacci/de/

Scientific paper

10.1086/375360

We investigate the accuracy attainable by forthcoming space-based observations of the cosmic microwave background (CMB) temperature and polarization anisotropy in constraining the dark energy density parameter $\Oq$ and equation of state $\wq=p_{\rm Q}/\rho_{\rm Q}$. Despite degeneracies among parameters, it is possible for high precision observations such as those from WMAP and Planck to provide interesting information on the nature of the dark energy. Furthermore, we show that imposing a flat universe constraint makes it possible to obtain tight limits in the space of dark energy parameters even from the CMB alone.

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