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

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

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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 language	English (US)
Article number	105
Journal	Proceedings of Science
Volume	9-13-June-2014
State	Published - 2014
Event	Advancing Astrophysics with the Square Kilometre Array, AASKA 2014 - Giardini Naxos, Italy Duration: Jun 9 2014 → Jun 13 2014

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Govoni, F., Murgia, M., Xu, H., Li, H., Norman, M., Feretti, L., Giovannini, G., Vacca, V., Bernardi, G., Bonafede, A., Brunetti, G., Carretti, E., Colafrancesco, S., Donnert, J., Ferrari, C., Gitti, M., Iapichino, L., Melanie, J. H., Pizzo, R., & Rudnick, L. (2014). Cluster magnetic fields through the study of polarized radio halos in the SKA era. Proceedings of Science, 9-13-June-2014, Article 105.

Govoni, F, Murgia, M, Xu, H, Li, H, Norman, M, Feretti, L, Giovannini, G, Vacca, V, Bernardi, G, Bonafede, A, Brunetti, G, Carretti, E, Colafrancesco, S, Donnert, J, Ferrari, C, Gitti, M, Iapichino, L, Melanie, JH, Pizzo, R & Rudnick, L 2014, 'Cluster magnetic fields through the study of polarized radio halos in the SKA era', Proceedings of Science, vol. 9-13-June-2014, 105.

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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.",

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

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AU - Govoni, Federica

AU - Murgia, Matteo

AU - Xu, Hao

AU - Li, Hui

AU - Norman, Michael

AU - Feretti, Luigina

AU - Giovannini, Gabriele

AU - Vacca, Valentina

AU - Bernardi, Gianni

AU - Bonafede, Annalisa

AU - Brunetti, Gianfranco

AU - Carretti, Ettore

AU - Colafrancesco, Sergio

AU - Donnert, Julius

AU - Ferrari, Chiara

AU - Gitti, Myriam

AU - Iapichino, Luigi

AU - Melanie, Johnston Hollitt

AU - Pizzo, Roberto

AU - Rudnick, Lawrence

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

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T2 - Advancing Astrophysics with the Square Kilometre Array, AASKA 2014

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ER -

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

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