Mathematics – Logic
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mgm..conf..326d&link_type=abstract
"THE ELEVENTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation an
Mathematics
Logic
Scientific paper
What can we learn, still, from Cosmic Microwave Background (CMB) observations? After the extremely successful maps of the early universe obtained from BOOMERanG, WMAP and all the other CMB anisotropy experiments, the focus of experimental CMB research is moving towards high angular resolution and polarization measurements. And here there is a lot to learn, on the outstanding issues of the current cosmological model. High accuracy polarization measurements are linked to the very early Universe (Inflation). High resolution measurements of SZ effect and CMB anisotropy will break degeneracies in cosmological parameters estimates, and will probe the early stages of cosmic structure formation. Extremely powerful machines, based on 10m-class mm-wave telescopes and large-format bolometer arrays, are now in an advanced development phase. The forthcoming Planck experiment of the European Space Agency will provide wide frequency coverage, full sky coverage, and very good angular resolution and sensitivity. It will be able to separate local foregrounds and cosmological background very efficiently, producing "definitive" maps of CMB anisotropy. It will also carry out very sensitive polarization measurements, detecting the "E-modes" of CMB polarization with high accuracy. It is not known if Planck will detect "B-modes" in the CMB polarization field. The extreme faintness of this signal most likely requires a new generation of experiments, using new detection and foreground removal technologies, and already proposed for future programs of NASA and ESA. The target is very ambitious, but can be the only way we have to test observationally the first split-second of our Universe.
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