• Citer

Constraints on the extragalactic magnetic fields from the NVSS Faraday rotation measures

par Pshirkov, Maxims ;Tiniakov, Petr ;Urban, Federico
Référence Pos proceedings of science, 30-July-2015, 544
Publication Publié, 2015

Article révisé par les pairs

• Détails
• Contenu

Résumé :

We use rotation measures data from the NVSS catalogue to derive new, statistically robust, upper limits on the strength of extragalactic magnetic fields. The extragalactic contribution to the rotation measures for a given field strength and correlation length grows with the distance. Based on the observation that low-luminosity distant radio sources do not exhibit any trend with their redshift, we then constrain extragalactic fields with Mpc coherence length to be below approximately 1.5 nG; a field coherent across the entire observable Universe instead is bounded to be below 0.6 nG. These limits do not depend on the particular origin of these cosmological fields.