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A radio ridge connecting two galaxy clusters in a filament of the cosmic web.
Govoni, F; Orrù, E; Bonafede, A; Iacobelli, M; Paladino, R; Vazza, F; Murgia, M; Vacca, V; Giovannini, G; Feretti, L; Loi, F; Bernardi, G; Ferrari, C; Pizzo, R F; Gheller, C; Manti, S; Brüggen, M; Brunetti, G; Cassano, R; de Gasperin, F; Enßlin, T A; Hoeft, M; Horellou, C; Junklewitz, H; Röttgering, H J A; Scaife, A M M; Shimwell, T W; van Weeren, R J; Wise, M.
Affiliation
  • Govoni F; Istituto Nazionale di Astrofisica-Osservatorio Astronomico di Cagliari Via della Scienza 5, I09047 Selargius, Italy. federica.govoni@inaf.it.
  • Orrù E; ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo, Netherlands.
  • Bonafede A; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Iacobelli M; Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, Via Gobetti 93/2, I40129 Bologna, Italy.
  • Paladino R; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany.
  • Vazza F; ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo, Netherlands.
  • Murgia M; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Vacca V; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Giovannini G; Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, Via Gobetti 93/2, I40129 Bologna, Italy.
  • Feretti L; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany.
  • Loi F; Istituto Nazionale di Astrofisica-Osservatorio Astronomico di Cagliari Via della Scienza 5, I09047 Selargius, Italy.
  • Bernardi G; Istituto Nazionale di Astrofisica-Osservatorio Astronomico di Cagliari Via della Scienza 5, I09047 Selargius, Italy.
  • Ferrari C; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Pizzo RF; Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, Via Gobetti 93/2, I40129 Bologna, Italy.
  • Gheller C; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Manti S; Istituto Nazionale di Astrofisica-Osservatorio Astronomico di Cagliari Via della Scienza 5, I09047 Selargius, Italy.
  • Brüggen M; Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, Via Gobetti 93/2, I40129 Bologna, Italy.
  • Brunetti G; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Cassano R; Department of Physics and Electronics, Rhodes University, Grahamstown, South Africa.
  • de Gasperin F; Square Kilometre Array South Africa, 3rd Floor, The Park, Park Road, Pinelands 7405, South Africa.
  • Enßlin TA; Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de la Recherche Scientifique, Laboratoire Lagrange, Blvd. de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France.
  • Hoeft M; ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo, Netherlands.
  • Horellou C; Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne, 1015 Ecublens, Lausanne, Switzerland.
  • Junklewitz H; Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy.
  • Röttgering HJA; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany.
  • Scaife AMM; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • Shimwell TW; Istituto Nazionale di Astrofisica-Istituto di Radioastronomia, Bologna Via Gobetti 101, I40129 Bologna, Italy.
  • van Weeren RJ; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany.
  • Wise M; Leiden University, Rapenburg 70, 2311 EZ Leiden, Netherlands.
Science ; 364(6444): 981-984, 2019 Jun 07.
Article in En | MEDLINE | ID: mdl-31171695
ABSTRACT
Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbulence in the intracluster gas. We observed a ridge of radio emission connecting the merging galaxy clusters Abell 0399 and Abell 0401 with the Low-Frequency Array (LOFAR) telescope network at 140 megahertz. This emission requires a population of relativistic electrons and a magnetic field located in a filament between the two galaxy clusters. We performed simulations to show that a volume-filling distribution of weak shocks may reaccelerate a preexisting population of relativistic particles, producing emission at radio wavelengths that illuminates the magnetic ridge.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Science Year: 2019 Document type: Article Affiliation country: Italy
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Science Year: 2019 Document type: Article Affiliation country: Italy