EAS Publications Series
Volume 14, 2005Dome C Astronomy and Astrophysics Meeting
|Page(s)||87 - 92|
|Published online||05 January 2006|
M. Giard, F. Casoli and F. Paletou (eds)
EAS Publications Series, 14 (2005) 87-92
Precision CMB Polarization from Dome-C: the BRAIN experiment
Department of Physics, University of Rome “La
2 Department of Physics, University of Milano Bicocca, Italy
3 ISTARS and Agenzia Spaziale Italiana, Italy
4 Cosmology Group, Collège de France, Paris, France
5 CESR, Toulouse, France
6 Department of Physics and Astronomy, University of Cardiff, UK
In the current cosmological scenario, part of the linearly polarized emission of the CMB is expected to be rotational (B-modes). This component is due to tensor perturbations of the metric produced by primordial gravitational waves, which are generated a split-second after the Big Bang. The signal expected is of the order of ≲ 0.1 μK, well below the non-rotational component of the polarization signal (E-modes), and beyond the sensitivity of present generation instruments. New, more sensitive instruments are developed in several labs, with the goal to measure the B-modes. Control of systematics and foregrounds will be the key to make the results of these experiments believable. In this paper we shortly outline BRAIN, a bolometric interferometer devoted to B-modes research, and its pathfinder experiment, devoted to test the Dome-C site.
© EAS, EDP Sciences, 2005
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