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A radio ridge connecting two galaxy clusters in a filament of the cosmic web

by Paladino, R. , Iacobelli, M. , Vacca, V. , Orrù, E. , Pizzo, R. F. , Röttgering, H. J. A. , van Weeren, R. J. , Murgia, M. , de Gasperin, F. , Horellou, C. , Loi, F. , Hoeft, M. , Feretti, L. , Cassano, R. , Govoni, F. , Shimwell, T. W. , Gheller, C. , Bonafede, A. , Giovannini, G. , Enßlin, T. A. , Bernardi, G. , Scaife, A. M. M. , Wise, M. , Junklewitz, H. , Vazza, F. , Brüggen, M. , Ferrari, C. , Brunetti, G. , Manti, S.

in Active galaxies / Astrophysics / Cosmology and Extra-Galactic Astrophysics / Dark matter / Deposition / Diffuse radio / Electrons / Emissions / extraterrestrial matter / Galactic clusters / Galaxy distribution / Galaxy mergers & collisions / Gamma rays / Intergalactic media / LOFAR / magnetic field / Magnetic fields / Particle acceleration / Radio / Radio astronomy / Radio emission / Radio telescopes / Relativism / Relativistic effects / Relativistic particles / Sciences of the Universe / Stars & galaxies / Universe / Wavelengths

2019

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A radio ridge connecting two galaxy clusters in a filament of the cosmic web

2019

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A radio ridge connecting two galaxy clusters in a filament of the cosmic web

2019

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Journal Article

A radio ridge connecting two galaxy clusters in a filament of the cosmic web

Paladino, R.,

Iacobelli, M.,

Vacca, V.,

Orrù, E.,

Pizzo, R. F.,

Röttgering, H. J. A.,

van Weeren, R. J.,

Murgia, M.,

de Gasperin, F.,

Horellou, C.,

Loi, F.,

Hoeft, M.,

Feretti, L.,

Cassano, R.,

Govoni, F.,

Shimwell, T. W.,

Gheller, C.,

Bonafede, A.,

Giovannini, G.,

Enßlin, T. A.,

Bernardi, G.,

Scaife, A. M. M.,

Wise, M.,

Junklewitz, H.,

Vazza, F.,

Brüggen, M.,

Ferrari, C.,

Brunetti, G.,

Manti, S.

2019

Overview

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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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science,American Association for the Advancement of Science (AAAS)

Subject

Active galaxies

/ Astrophysics

/ Cosmology and Extra-Galactic Astrophysics

/ extraterrestrial matter

/ Galactic clusters

/ Galaxy distribution