Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30391
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Savini, F. | en_US |
dc.contributor.author | Bonafede, A. | en_US |
dc.contributor.author | Brüggen, M. | en_US |
dc.contributor.author | van Weeren, R. | en_US |
dc.contributor.author | Brunetti, G. | en_US |
dc.contributor.author | Intema, H. | en_US |
dc.contributor.author | Botteon, A. | en_US |
dc.contributor.author | Shimwell, T. | en_US |
dc.contributor.author | Wilber, A. | en_US |
dc.contributor.author | Rafferty, D. | en_US |
dc.contributor.author | Giacintucci, S. | en_US |
dc.contributor.author | CASSANO, Rossella | en_US |
dc.contributor.author | Cuciti, V. | en_US |
dc.contributor.author | de Gasperin, F. | en_US |
dc.contributor.author | Röttgering, H. | en_US |
dc.contributor.author | Hoeft, M. | en_US |
dc.contributor.author | White, G. | en_US |
dc.date.accessioned | 2021-02-15T12:35:23Z | - |
dc.date.available | 2021-02-15T12:35:23Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30391 | - |
dc.description.abstract | Diffuse synchrotron radio emission from cosmic ray electrons is observed at the centre of a number of galaxy clusters. These sources can be classified either as giant radio haloes, which occur in merging clusters, or as mini haloes, which are found only in cool-core clusters. In this paper, we present the first discovery of a cool-core cluster with an associated mini halo that also shows ultra-steep-spectrum emission extending well beyond the core that resembles radio halo emission. The large-scale component is discovered thanks to LOFAR observations at 144 MHz. We also analyse GMRT observations at 610 MHz to characterize the spectrum of the radio emission. An X-ray analysis reveals that the cluster is slightly disturbed, and we suggest that the steep-spectrum radio emission outside the core could be produced by a minor merger that powers electron re-acceleration without disrupting the cool core. This discovery suggests that, under particular circumstances, both a mini halo and giant halo could co-exist in a single cluster, opening new perspectives for particle acceleration mechanisms in galaxy clusters. | en_US |
dc.language.iso | eng | en_US |
dc.title | First evidence of diffuse ultra-steep-spectrum radio emission surrounding the cool core of a cluster | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty1125 | en_US |
dc.identifier.scopus | 2-s2.0-85052508673 | en_US |
dc.identifier.isi | 000439547400062 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article-abstract/478/2/2234/4990955?redirectedFrom=fulltext | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 478 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 2234 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.478.2234S | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0003-4046-0637 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1805.01900.pdf | postprint | 3.69 MB | Adobe PDF | View/Open |
sty1125.pdf | Pdf editoriale | 8.8 MB | Adobe PDF | View/Open |
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