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Mega-parsec scale magnetic fields in low density regions in the SKA era: filaments connecting galaxy clusters and groups

Journal
Date Issued
2015
Author(s)
•
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Brown, Shea
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Ferrari, Chiara
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•
•
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DOI
Abstract
The presence of magnetic fields in galaxy clusters has been well established in recent years, and their importance for the understanding of the physical processes at work in the Intra Cluster Medium has been recognized. Halo and relic sources have been detected in several tens clusters. A strong correlation is present between the halo and relic radio power and the X-ray luminosity. Since cluster X-Ray luminosity and mass are related, the correlation between the radio power and X-ray luminosity could derive from a physical dependence of the radio power on the cluster mass, therefore the cluster mass could be a crucial parameter in the formation of these sources. The goal of this project is to investigate the existence of non-thermal structures beyond the Mpc scale, and associated with lower density regions with respect to clusters of galaxies: galaxy filaments connecting rich clusters. We present a piece of evidence of diffuse radio emission in intergalactic filaments. Moreover, we present and discuss the detection of radio emission in galaxy groups and in faint X-Ray clusters, to analyze non-thermal properties in low density regions with physical conditions similar to galaxy filaments. We discuss how SKA1 observations will allow the investigation of this topic and the study of the presence of diffuse radio sources in low density regions. This will be a fundamental step to understand the origin and properties of cosmological magnetic fields.
Coverage
Advancing Astrophysics with the Square Kilometre Array (AASKA14)
Volume
215
Start page
104
Conferenece
Advancing Astrophysics with the Square Kilometre Array (AASKA14)
Conferenece place
Giardini Naxos, Italy
Conferenece date
9-13 June, 2014
Uri
Url
Issn Identifier
1824-8039
Ads BibCode
2015aska.confE.104G
Rights
open.access
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