Vacca , V , Murgia , M , Govoni , F , Loi , F , Vazza , F , Finoguenov , A , Carretti , E , Feretti , L , Giovannini , G , Concu , R , Melis , A , Gheller , C , Paladino , R , Poppi , S , Valente , G , Bernardi , G , Boschin , W , Brienza , M , Clarke , T E , Colafrancesco , S , Ensslin , T A , Ferrari , C , de Gasperin , F , Gastaldello , F , Girardi , M , Gregorini , L , Johnston-Hollitt , M , Junklewitz , H , Orru , E , Parma , P , Perley , R & Taylor , G B 2018 , ' Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope ' , Monthly Notices of the Royal Astronomical Society , vol. 479 , no. 1 , pp. 776-806 . https://doi.org/10.1093/mnras/sty1151
Title: | Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope |
Author: | Vacca, V.; Murgia, M.; Govoni, F.; Loi, F.; Vazza, F.; Finoguenov, A.; Carretti, E.; Feretti, L.; Giovannini, G.; Concu, R.; Melis, A.; Gheller, C.; Paladino, R.; Poppi, S.; Valente, G.; Bernardi, G.; Boschin, W.; Brienza, M.; Clarke, T. E.; Colafrancesco, S.; Ensslin, T. A.; Ferrari, C.; de Gasperin, F.; Gastaldello, F.; Girardi, M.; Gregorini, L.; Johnston-Hollitt, M.; Junklewitz, H.; Orru, E.; Parma, P.; Perley, R.; Taylor, G. B. |
Contributor organization: | Department of Physics |
Date: | 2018-09 |
Language: | eng |
Number of pages: | 31 |
Belongs to series: | Monthly Notices of the Royal Astronomical Society |
ISSN: | 0035-8711 |
DOI: | https://doi.org/10.1093/mnras/sty1151 |
URI: | http://hdl.handle.net/10138/308047 |
Abstract: | We report the detection of diffuse radio emission which might be connected to a large-scale filament of the cosmic web covering a 8 degrees x 8 degrees area in the sky, likely associated with a z approximate to 0.1 overdensity traced by nine massive galaxy clusters. In this work, we present radio observations of this region taken with the Sardinia Radio Telescope. Two of the clusters in the field host a powerful radio halo sustained by violent ongoing mergers and provide direct proof of intracluster magnetic fields. In order to investigate the presence of large-scale diffuse radio synchrotron emission in and beyond the galaxy clusters in this complex system, we combined the data taken at 1.4 GHz with the Sardinia. Radio Telescope with higher resolution data taken with the NRAO VIA Sky Survey. We found 28 candidate new sources with a size larger and X-ray emission fainter than known diffuse large-scale synchrotron cluster sources for a given radio power. This new population is potentially the tip of the iceberg of a class of diffuse large-scale synchrotron sources associated with the filaments of the cosmic web. In addition, we found in the field a candidate new giant radio galaxy. |
Subject: |
acceleration of particles
magnetic fields galaxies: clusters medium cosmology: observations large-scale structure of Universe VLA SKY SURVEY MAGNETIC-FIELDS LOW-FREQUENCY COSMIC FILAMENTS EMISSION ABELL EVOLUTION SPECTRUM BARYONS SCALE 115 Astronomy, Space science |
Peer reviewed: | Yes |
Rights: | cc_by_nc_sa |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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