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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Detalles Bibliográficos
Autor principal: Giovannini, Massimo
Lenguaje:eng
Publicado: 2010
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.81.123003
http://cds.cern.ch/record/1235472
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author Giovannini, Massimo
author_facet Giovannini, Massimo
author_sort Giovannini, Massimo
collection CERN
description 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 dominant source of circular dichroism stems from the large-scale fluctuations of the spatial curvature.
id cern-1235472
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-12354722023-03-14T16:43:25Zdoi:10.1103/PhysRevD.81.123003http://cds.cern.ch/record/1235472engGiovannini, MassimoLast scattering, relic gravitons and the circular polarization of the CMBAstrophysics and AstronomyThe 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 dominant source of circular dichroism stems from the large-scale fluctuations of the spatial curvature.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 dominant source of circular dichroism stems from the large-scale fluctuations of the spatial curvature.arXiv:1001.4172CERN-PH-TH-2010-012CERN-PH-TH-2010-012oai:cds.cern.ch:12354722010-01-26
spellingShingle Astrophysics and Astronomy
Giovannini, Massimo
Last scattering, relic gravitons and the circular polarization of the CMB
title Last scattering, relic gravitons and the circular polarization of the CMB
title_full Last scattering, relic gravitons and the circular polarization of the CMB
title_fullStr Last scattering, relic gravitons and the circular polarization of the CMB
title_full_unstemmed Last scattering, relic gravitons and the circular polarization of the CMB
title_short Last scattering, relic gravitons and the circular polarization of the CMB
title_sort last scattering, relic gravitons and the circular polarization of the cmb
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevD.81.123003
http://cds.cern.ch/record/1235472
work_keys_str_mv AT giovanninimassimo lastscatteringrelicgravitonsandthecircularpolarizationofthecmb

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