Probing the origin of extragalactic magnetic fields with Fast Radio Bursts

Vazza, F. ; Bruggen, M. ; Hinz, P. M. ; Wittor, D. ; Locatelli, N. ; Gheller, C. (2018) Probing the origin of extragalactic magnetic fields with Fast Radio Bursts. [Preprint]
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The joint analysis of the Dispersion and Faraday Rotation Measure from distant, polarised Fast Radio Bursts may be used to put constraints on the origin and distribution of extragalactic magnetic fields on cosmological scales. While the combination of Dispersion and Faraday Rotation Measure can in principle give the average magnetic fields along the line-of-sight,in practice this method must be used with care because it strongly depends on the assumed magnetisation model on large cosmological scales. Our simulations show that the observation of Rotation Measures with greater than or equal to 1 − 10 rad/m2 in ∼ 10^2 − 10^3 Fast Radio Bursts will likely be able to discriminate between extreme scenarios for the origin of cosmic magnetic fields, independent of the exact distribution of sources with redshift. This represent a strong case for incoming (e.g. ALERT, CHIME) and future (e.g. with the Square Kilometer Array) radio polarisation surveys of the sky.

Document type
Vazza, F.University of Bologna, Hamburger Sternwarte, INAF - Istituto di Radioastronomia -
Bruggen, M.Hamburger Sternwarte
Hinz, P. M.Hamburger Sternwarte, Universitats-Sternwarte Muenchen
Wittor, D.University of Bologna, Hamburger Sternwarte, INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
Locatelli, N.University of Bologna, INAF - Istituto di Radioastronomia - Bologna
Gheller, C.CSCS-ETHZ - Lugano
galaxy: clusters, general – methods: numerical – intergalactic medium – largescale structure of Universe
Deposit date
23 Jul 2018 14:47
Last modified
23 May 2019 09:43
Project name
MAGCOW - The Magnetised Cosmic Web
Funding program
EC - H2020

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