Cluster magnetic fields through the study of polarized radio halos in the SKA era

Federica Govoni, Matteo Murgia, Hao Xu, Hui Li, Michael Norman, Luigina Feretti, Gabriele Giovannini, Valentina Vacca, Gianni Bernardi, Annalisa Bonafede, Gianfranco Brunetti, Ettore Carretti, Sergio Colafrancesco, Julius Donnert, Chiara Ferrari, Myriam Gitti, Luigi Iapichino, Johnston Hollitt Melanie, Roberto Pizzo, Lawrence Rudnick

    Research output: Contribution to journalConference articlepeer-review

    20 Scopus citations

    Abstract

    Galaxy clusters are unique laboratories to investigate turbulent fluid motions and large scale magnetic fields. Synchrotron radio halos at the center of merging galaxy clusters provide the most spectacular and direct evidence of the presence of relativistic particles and magnetic fields associated with the intracluster medium. The study of polarized emission from radio halos is extremely important to constrain the properties of intracluster magnetic fields and the physics of the acceleration and transport of the relativistic particles. However, detecting this polarized signal is a very hard task with the current radio facilities. We use cosmological magneto-hydrodynamical simulations to predict the expected polarized surface brightness of radio halos at 1.4 GHz. We compare these expectations with the sensitivity and the resolution reachable with the SKA1. This allows us to evaluate the potential for studying intracluster magnetic fields in the surveys planned for SKA1.

    Original languageEnglish (US)
    Article number105
    JournalProceedings of Science
    Volume9-13-June-2014
    StatePublished - Jan 1 2014
    EventAdvancing Astrophysics with the Square Kilometre Array, AASKA 2014 - Giardini Naxos, Italy
    Duration: Jun 9 2014Jun 13 2014

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