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http://hdl.handle.net/20.500.12386/24015
Title: | Unravelling the origin of large-scale magnetic fields in galaxy clusters and beyond through Faraday Rotation Measures with the SKA | Authors: | Bonafede, A. VAZZA, FRANCO Brüggen, M. Akahori, T. CARRETTI, ETTORE Colafrancesco, S. Feretti, L. Ferrari, C. Giovannini, Gabriele GOVONI, FEDERICA Johnston-Hollitt, M. MURGIA, MATTEO Scaife, A. VACCA, VALENTINA Govoni, F. Rudnick, L. |
Issue Date: | 2015 | Journal: | POS PROCEEDINGS OF SCIENCE | Volume: | Advancing Astrophysics with the Square Kilometre Array (AASKA14) | Number: | 215 | First Page: | 95 | Abstract: | We investigate the possibility for the SKA to detect and study the magnetic fields in galaxy clusters and in the less dense environments surrounding them using Faraday Rotation Measures. To this end, we produce 3-dimensional magnetic field models for galaxy clusters of different masses and in different stages of their evolution, and derive mock rotation measure observations of background radiogalaxies. According to our results, already in phase I, we will be able to infer the magnetic field properties in galaxy clusters as a function of the cluster mass, down to $10^{13}$ solar-masses. Moreover, using cosmological simulations to model the gas density, we have computed the expected rotation measure through shock-fronts that occur in the intra-cluster medium during cluster mergers. The enhancement in the rotation measure due to the density jump will permit to constraint the magnetic field strength and structure after the shock passage. SKA observations of polarised sources located behind galaxy clusters will answer several questions about the magnetic field strength and structure in galaxy clusters, and its evolution with cosmic time. | Conference Name: | Advancing Astrophysics with the Square Kilometre Array (AASKA14) | Conference Place: | Giardini Naxos, Italy | Conference Date: | 9 -13 June, 2014 | URI: | http://hdl.handle.net/20.500.12386/24015 | URL: | https://pos.sissa.it/215/095 | ISSN: | 1824-8039 | ISBN: | 9781909204706 | DOI: | 10.22323/1.215.0095 | Bibcode ADS: | 2015aska.confE..95B | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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AASKA14_095.pdf | PDF editoriale | 539.81 kB | Adobe PDF | View/Open |
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