Abstract:Année de publication : 2000
We propose here a new method for detecting relics of topological defects such as cosmic strings based on induced B-type polarization on small scale in the cosmic microwave background (CMB). Models of inflation, in which large scale structures of the Universe emerge from the inflaton fluctuations, do not exclude the formation of topological defects at the end of the inflationary phase. In such case, we show that the lens effect of a string on the small scale E-type polarization of the cosmic microwave background induces a significant amount of B-type polarization along the line-of-sight. The amplitude of the effect is estimated for different resolutions of cosmic microwave background experiments.