Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-12-06
Phys.Rev.Lett. 87 (2001) 191301
Astronomy and Astrophysics
Astrophysics
4pages, Latex with four eps figures. (Revised 18 Dec 2000. Minor typos corrected)
Scientific paper
10.1103/PhysRevLett.87.191301
The role of cosmic microwave background (CMB) polarisation data in constraining the presence of primordial isocurvature modes is examined. While the MAP satellite mission will be unable to simultaneously constrain isocurvature modes and cosmological parameters, the PLANCK mission will be able to set strong limits on the presence of isocurvature modes if it makes a precise measurement of the CMB polarisation sky. We find that if we allow for the possible presence of isocurvature modes, the recently obtained BOOMERANG measurement of the curvature of the universe fails. However, a comparably sensitive polarisation measurement on the same angular scales will permit a determination of the curvature of the universe without the prior assumption of adiabaticity.
Bucher Martin
Moodley Kavilan
Turok Neil
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