Abstract
We compute the cosmic microwave background bispectrum arising from the cross-correlation of primordial, lensing, and Rees-Sciama signals. The amplitude of the bispectrum signal is sensitive to the matter density parameter and the equation of state of the dark energy, which we parametrize by We conclude that the data set of the Atacama Cosmology Telescope, combined with MAP 2-year data, or the Planck data set alone will allow us to break the degeneracy between and that arises from the analysis of the CMB power spectrum. In particular a joint measurement of and with 10% and 30% error on the two parameters, respectively, at the 90% confidence level can realistically be achieved.
- Received 10 August 2001
DOI:https://doi.org/10.1103/PhysRevD.65.043007
©2002 American Physical Society