dc.contributor.author | Hardcastle, M. J. | |
dc.contributor.author | Croston, J. H. | |
dc.contributor.author | Shimwell, T. W. | |
dc.contributor.author | Tasse, C. | |
dc.contributor.author | Gurkan Uygun, Gulay | |
dc.contributor.author | Morganti, R. | |
dc.contributor.author | Murgia, M. | |
dc.contributor.author | Rottgering, H. J. A. | |
dc.contributor.author | Weeren, R. J. van | |
dc.contributor.author | Williams, W. L. | |
dc.date.accessioned | 2019-08-01T16:29:04Z | |
dc.date.available | 2019-08-01T16:29:04Z | |
dc.date.issued | 2019-09-01 | |
dc.identifier.citation | Hardcastle , 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.issn | 0035-8711 | |
dc.identifier.other | PURE: 17074240 | |
dc.identifier.other | PURE UUID: 3f5c4ba4-b78a-4b51-858c-0d4e3c2da750 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1907.03274v1 | |
dc.identifier.other | ORCID: /0000-0001-7315-1596/work/62750962 | |
dc.identifier.other | Scopus: 85082625320 | |
dc.identifier.uri | http://hdl.handle.net/2299/21539 | |
dc.description | 7 pages, 2 colour figures. Accepted by MNRAS | |
dc.description.abstract | We 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.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | astro-ph.GA | |
dc.title | NGC 326: X-shaped no more | en |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.version | AM | |
rioxxterms.versionofrecord | https://doi.org/10.1093/mnras/stz1910 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |