CMB polarization constraints on inflation

Details CMB polarization constraints on inflation CMB polarization constraints on inflation

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..478..168k&link_type=abstract

Second international workshop on particle physics and the early universe (COSMO-98). AIP Conference Proceedings, Volume 478, pp

Physics

Particle-Theory And Field-Theory Models Of The Early Universe, Background Radiations

Scientific paper

In this talk I consider cosmic microwave background (CMB) polarization as a tool for constraining models of cosmological inflation [1]. I use NASA's MAP satellite and the ESA's Planck Surveyor as examples of the observational accuracy that will be achievable in the next few years. I come to two main conclusions. First, cosmic variance in temperature-only measurements severely limits the ability to detect a small tensor/scalar ratio, and measurement of polarization allows significant improvement in the ability to study models that predict very small tensor contributions to the CMB. Second, reionization of the universe can significantly degrade the sensitivity of parameter estimation if temperature anisotropy alone is measured, but measurement of polarization effectively removes the parameter degeneracy between tensor amplitude and reionization optical depth.

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