Abstract Details
| Name: Ophelia Fabre Affiliation: IISER Thiruvananthapuram Conference ID: ASI2016_395 Title : Signature of primordial magnetic fields in the CMB with Faraday rotation Authors and Co-Authors : J.Kovoor, S.Shankaranarayanan Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : The origin of large coherence-length magnetic fields in the Universe remains currently unknown. Different mechanisms have been proposed to explain them, and we focus here on seed magnetic fields produced in the early Universe, and then amplified by dynamo effect in galaxies. We show that the Cosmic Microwave Background (CMB) polarization is efficient to constrain these primordial magnetic fields thanks to Faraday rotation. Faraday rotation is the modification of the polarization of an incoming electro-magnetic wave in a medium where free electrons and a magnetic field are already present. We present different models of primordial magnetic fields and their characteristic Faraday rotation signatures in the CMB power spectra. We finally discuss their detectability with regards to Planck data. |