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 Omega(Q) and equation of state w(Q) = p(Q)/rho(Q). 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.
Balbi, A., Baccigalupi, C., Perrotta, F., Matarrese, S., Vittorio, N. (2003). Probing dark energy with the cosmic microwave background: Projected constraints from the Wilkinson Microwave Anisotropy Probe and Planck. THE ASTROPHYSICAL JOURNAL, 588(1) [10.1086/375360].
Probing dark energy with the cosmic microwave background: Projected constraints from the Wilkinson Microwave Anisotropy Probe and Planck
BALBI, AMEDEO;VITTORIO, NICOLA
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 Omega(Q) and equation of state w(Q) = p(Q)/rho(Q). 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.