Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29930
DC Field | Value | Language |
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dc.contributor.author | Hardcastle, M. J. | en_US |
dc.contributor.author | Croston, J. H. | en_US |
dc.contributor.author | Shimwell, T. W. | en_US |
dc.contributor.author | Tasse, C. | en_US |
dc.contributor.author | Gürkan, G. | en_US |
dc.contributor.author | Morganti, R. | en_US |
dc.contributor.author | MURGIA, MATTEO | en_US |
dc.contributor.author | Röttgering, H. J. A. | en_US |
dc.contributor.author | van Weeren, R. J. | en_US |
dc.contributor.author | Williams, W. L. | en_US |
dc.date.accessioned | 2021-01-21T18:43:49Z | - |
dc.date.available | 2021-01-21T18:43:49Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29930 | - |
dc.description.abstract | We present new 144-MHz Low-Frequency Array (LOFAR) observations of the prototypical `X-shaped' radio galaxy NGC 326, which show that the formerly known wings of the radio lobes extend smoothly into a large-scale, complex radio structure. We argue that this structure is most likely the result of hydrodynamical effects in an ongoing group or cluster merger, for which pre-existing X-ray and optical data provide independent evidence. The large-scale radio structure is hard to explain purely in terms of jet reorientation due to the merger of binary black holes, a previously proposed explanation for the inner structure of NGC 326. For this reason, we suggest that the simplest model is one in which the merger-related hydrodynamical processes account for all the source structure, though we do not rule out the possibility that a black hole merger has occurred. Inference of the black hole-black hole merger rate from observations of X-shaped sources should be carried out with caution in the absence of deep, sensitive low-frequency observations. Some X-shaped sources may be signposts of cluster merger activity, and it would be useful to investigate the environments of these objects more generally. | en_US |
dc.language.iso | eng | en_US |
dc.title | NGC 326: X-shaped no more | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz1910 | en_US |
dc.identifier.scopus | 2-s2.0-85082625320 | en_US |
dc.identifier.isi | 000485158400033 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/488/3/3416/5531325 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 488 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3416 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | 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 | 2019MNRAS.488.3416H | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | 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.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0002-4800-0806 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Hardcastle_2019.pdf | PDF editoriale | 1.66 MB | Adobe PDF | View/Open |
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