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A plethora of diffuse steep spectrum radio sources in Abell 2034 revealed by LOFAR

A plethora of diffuse steep spectrum radio sources ...

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dc.contributor.author Shimwell, T. W. pl
dc.contributor.author Luckin, J. pl
dc.contributor.author Brüggen, M. pl
dc.contributor.author Brunetti, G. pl
dc.contributor.author Intema, H. T. pl
dc.contributor.author Owers, M. S. pl
dc.contributor.author Röttgering, H. J. A. pl
dc.contributor.author Stroe, A. pl
dc.contributor.author van Weeren, R. J. pl
dc.contributor.author Williams, W. L. pl
dc.contributor.author Cassano, R. pl
dc.contributor.author de Gasperin, F. pl
dc.contributor.author Heald, G. H. pl
dc.contributor.author Hoang, D. N. pl
dc.contributor.author Hardcastle, M. J. pl
dc.contributor.author Sridhar, S. S. pl
dc.contributor.author Sabater, J. pl
dc.contributor.author Best, P. N. pl
dc.contributor.author Bonafede, A. pl
dc.contributor.author Chyży, Krzysztof [SAP11011785] pl
dc.contributor.author Enßlin, T. A. pl
dc.contributor.author Ferrari, C. pl
dc.contributor.author Haverkorn, M. pl
dc.contributor.author Hoeft, M. pl
dc.contributor.author Horellou, C. pl
dc.contributor.author McKean, J. P. pl
dc.contributor.author Morabito, L. K. pl
dc.contributor.author Orrú, E. pl
dc.contributor.author Pizzo, R. pl
dc.contributor.author Retana-Montenegro, E. pl
dc.contributor.author White, G. J. pl
dc.date.accessioned 2016-06-29T12:46:34Z
dc.date.available 2016-06-29T12:46:34Z
dc.date.issued 2016 pl
dc.identifier.issn 0035-8711 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/28471
dc.language eng pl
dc.rights Dodaję tylko opis bibliograficzny *
dc.rights.uri *
dc.title A plethora of diffuse steep spectrum radio sources in Abell 2034 revealed by LOFAR pl
dc.type JournalArticle pl
dc.description.physical 277-290 pl
dc.abstract.en With Low-Frequency Array (LOFAR) observations, we have discovered a diverse assembly of steep spectrum emission that is apparently associated with the intracluster medium (ICM) of the merging galaxy cluster Abell 2034. Such a rich variety of complex emission associated with the ICM has been observed in few other clusters. This not only indicates that Abell 2034 is a more interesting and complex system than previously thought but it also demonstrates the importance of sensitive and high-resolution, low-frequency observations. These observations can reveal emission from relativistic particles which have been accelerated to sufficient energy to produce observable emission or have had their high energy maintained by mechanisms in the ICM. The most prominent feature in our maps is a bright bulb of emission connected to two steep spectrum filamentary structures, the longest of which extends perpendicular to the merger axis for 0.5 Mpc across the south of the cluster. The origin of these objects is unclear, with no shock detected in the X-ray images and no obvious connection with cluster galaxies or AGNs. We also find that the X-ray bright region of the cluster coincides with a giant radio halo with an irregular morphology and a very steep spectrum. In addition, the cluster hosts up to three possible radio relics, which are misaligned with the cluster X-ray emission. Finally, we have identified multiple regions of emission with a very steep spectral index that seem to be associated with either tailed radio galaxies or a shock. pl
dc.subject.en acceleration of particles pl
dc.subject.en galaxies: clusters: individual: Abell 2034 pl
dc.subject.en galaxies: clusters: intracluster medium pl
dc.subject.en radiation mechanisms: non-thermal pl
dc.subject.en radio continuum general pl
dc.subject.en shock waves pl
dc.description.volume 459 pl
dc.description.number 1 pl
dc.identifier.doi 10.1093/mnras/stw661 pl
dc.identifier.eissn 1365-2966 pl
dc.title.journal Monthly Notices of the Royal Astronomical Society pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.rights.original OTHER; inne; ostateczna wersja wydawcy; po opublikowaniu; 36; pl
.pointsMNiSW [2016 A]: 35

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