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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/2811 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/2811 http://eprints.org/relation/ismediumThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/2811 2822 2 8068 document 2822 small.jpg image/png c9ec47ba1c6b835ea114f86e9d4be564 MD5 1784 2014-01-27 20:34:17 http://eprints.iliauni.edu.ge/728/6/small.jpg 728 6 6 image/png other Thumbnails conversion from text to thumbnail_small ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/2811 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/2811 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/2811 archive 131 disk0/00/00/07/28 2014-01-29 20:42:37 2015-03-27 06:59:33 2014-01-29 20:42:37 article show Caprini Chiara Durrer Ruth Kahniashvili Tina tinatin@iliauni.edu.ge pub QB QC public We study the effect of a helicity component of a primordial magnetic field on the tensor part of the cosmic microwave background temperature anisotropies and polarization. We give analytical approximations for the tensor contributions induced by helicity, discussing their amplitude and spectral index in dependence of the power spectrum of the primordial magnetic field. We find that an helical magnetic field creates a parity odd component of gravity waves inducing parity odd polarization signals. However, only if the magnetic field is close to scale invariant and if its helical part is close to maximal, the effect is sufficiently large to be observable. We also discuss the implications of causality on the magnetic field spectrum. 2005 published Physical Review D 69 063003 TRUE