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dc.contributor.authorHardcastle, M. J.
dc.contributor.authorCroston, J. H.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorTasse, C.
dc.contributor.authorGurkan Uygun, Gulay
dc.contributor.authorMorganti, R.
dc.contributor.authorMurgia, M.
dc.contributor.authorRottgering, H. J. A.
dc.contributor.authorWeeren, R. J. van
dc.contributor.authorWilliams, W. L.
dc.date.accessioned2019-08-01T16:29:04Z
dc.date.available2019-08-01T16:29:04Z
dc.date.issued2019-09-01
dc.identifier.citationHardcastle , M J , Croston , J H , Shimwell , T W , Tasse , C , Gurkan Uygun , G , Morganti , R , Murgia , M , Rottgering , H J A , Weeren , R J V & Williams , W L 2019 , ' NGC 326: X-shaped no more ' , Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stz1910
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 17074240
dc.identifier.otherPURE UUID: 3f5c4ba4-b78a-4b51-858c-0d4e3c2da750
dc.identifier.otherArXiv: http://arxiv.org/abs/1907.03274v1
dc.identifier.otherORCID: /0000-0001-7315-1596/work/62750962
dc.identifier.urihttp://hdl.handle.net/2299/21539
dc.description7 pages, 2 colour figures. Accepted by MNRAS
dc.description.abstractWe present new 144-MHz 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
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.GA
dc.titleNGC 326: X-shaped no moreen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stz1910
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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