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Last scattering, relic gravitons and the circular polarization of the CMB
The tensor contribution to the $V$-mode polarization induced by a magnetized plasma at last scattering vanishes exactly. Conversely a polarized background of relic gravitons cannot generate a $V$-mode polarization. The reported results suggest that, in the magnetized $\Lambda$CDM paradigm, the domin...
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| Lenguaje: | eng |
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2010
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| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.81.123003 http://cds.cern.ch/record/1235472 |