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 ΩQ and equation of state wQ = pQ/ρQ. Despite degeneracies among parameters, it is possible for high-precision observations such as those from the Wilkinson Microwave Anisotropy Probe 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.

Probing dark energy with the cosmic microwave background: Projected constraints from the Wilkinson Microwave Anisotropy Probe and Planck / Balbi, A.; Baccigalupi, C.; Perrotta, F.; Matarrese, S.; Vittorio, N.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 588:1(2003), pp. L5-L8. [10.1086/375360]

Probing dark energy with the cosmic microwave background: Projected constraints from the Wilkinson Microwave Anisotropy Probe and Planck

Baccigalupi, C.;Perrotta, F.;
2003-01-01

Abstract

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 ΩQ and equation of state wQ = pQ/ρQ. Despite degeneracies among parameters, it is possible for high-precision observations such as those from the Wilkinson Microwave Anisotropy Probe 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.
2003
588
1
L5
L8
https://doi.org/10.1086/375360
https://arxiv.org/abs/astro-ph/0301192
Balbi, A.; Baccigalupi, C.; Perrotta, F.; Matarrese, S.; Vittorio, N.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/13385
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