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Open AccessArticle

Extended Radio Emission in the Perhipheral Regions of the Shapley Concentration Core

INAF, Istituto di Radioastronomia, Via Gobetti 101, 40129 Bologna, Italy
INAF, Osservatorio Astronomico, Via Ranzani 1, 40127 Bologna, Italy
Department of Physics and Astronomy, DIFA, Universitá di Bologna, Via Ranzani 1, 40127 Bologna, Italy
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
INAF, IASF-Milano, Via Bassini 15, I-20133 Milano, Italy
Naval Research Laboratory, Washington, DC 20375, USA
Department of Astronomy, University of Maryland, College Park, MD 20742, USA
Author to whom correspondence should be addressed.
Academic Editors: Stefano Ettori and Dominique Eckert
Galaxies 2017, 5(1), 16;
Received: 3 November 2016 / Revised: 3 February 2017 / Accepted: 3 February 2017 / Published: 14 February 2017
(This article belongs to the Special Issue Exploring the Outskirts of Galaxy Clusters)
The Shapley Concentration (SC) is a galaxy supercluster (few tens of degrees) in the Local Universe (<z>∼0.048) which is currently undergoing cluster mergers and group accretion. It is a diversified environment, with cluster complexes in advanced evolutionary stage, groups of clusters in the very early stages of merger, fairly massive clusters with ongoing accretion activity, and smaller groups located in filaments. These features make the SC an ideal place to observe the signatures of the formation of large-scale structures in the Universe. As a matter of fact, the SC has been observed over a broad range of frequencies with the most important observatories, allowing for a unique multiband study. In this paper, we will present new results from an ongoing study of the Shapley Concentration Core, which is being carried out with the Giant Metrewave Radio Telescope (GMRT). Our work confirms the role played by radio observations in disentangling the details of the accretion and merging processes, and delivers a wealth of information in regions well outside the cluster cores. In particular, we will report on the discovery of a relic in the region between the two clusters A 3558 and A 3562, and of the radio properties of the brightest galaxy in the peripheral cluster A 3556. View Full-Text
Keywords: Galaxy clusters; Shapley Concentration; radio sources Galaxy clusters; Shapley Concentration; radio sources
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Venturi, T.; Bardelli, S.; Dallacasa, D.; Di Gennaro, G.; Gastaldello, F.; Giacintucci, S.; Rossetti, M. Extended Radio Emission in the Perhipheral Regions of the Shapley Concentration Core. Galaxies 2017, 5, 16.

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