Probing the origin of extragalactic magnetic fields with Fast Radio Bursts

Vazza, F.; Brueggen, M.; Hinz, P. M.; Wittor, D.; Locatelli, N. und Gheller, C. (2018): Probing the origin of extragalactic magnetic fields with Fast Radio Bursts. In: Monthly Notices of the Royal Astronomical Society, Bd. 480, Nr. 3: S. 3907-3915

Abstract

The joint analysis of the Dispersion and Faraday Rotation Measure (RM) from distant, polarized Fast Radio Bursts (FRBs) 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 RM 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 magnetization model on large cosmological scales. Our simulations show that the observation of RMs with >= 1 - 10 rad m(-2) in similar to 10(2)-10(3) FRBs 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 represents a strong case for incoming (e.g. ALERT, CHIME) and future (e.g. with the Square Kilometer Array) radio polarization surveys of the sky.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0035-8711
• Sprache: Englisch