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dc.contributor.authorHardcastle, M.J.
dc.date.accessioned2010-11-30T11:30:47Z
dc.date.available2010-11-30T11:30:47Z
dc.date.issued2010
dc.identifier.citationHardcastle , M J 2010 , ' Which radio galaxies can make the highest energy cosmic rays? ' , Monthly Notices of the Royal Astronomical Society , vol. 405 , no. 4 , pp. 2810-2816 . https://doi.org/10.1111/j.1365-2966.2010.16668.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 138179
dc.identifier.otherPURE UUID: d084010e-8ef7-4b49-9c12-62c1247a89fa
dc.identifier.otherdspace: 2299/5032
dc.identifier.otherScopus: 77955028292
dc.identifier.urihttp://hdl.handle.net/2299/5032
dc.descriptionThe definitive version can be found at: http://www3.interscience.wiley.com/ Copyright Royal Astronomical Society
dc.description.abstractNumerous authors have suggested that the ultra-high-energy cosmic rays (UHECR) detected by the Pierre Auger Observatory and other cosmic ray telescopes may be accelerated in the nuclei, jets or lobes of radio galaxies. Here, I focus on stochastic acceleration in the lobes. I show that the requirement that they accelerate protons to the highest observed energies places constraints on the observable properties of radio lobes that are satisfied by a relatively small number of objects within the Greisen–Zat'sepin–Kuzmin cut-off; if UHECR are protons and are accelerated within radio lobes, their sources are probably already known and catalogued radio galaxies. I show that lobe acceleration also implies a (charge-dependent) upper energy limit on the UHECR that can be produced in this way; if lobes are the dominant accelerators in the local Universe and if UHECR are predominantly protons, we are unlikely to see cosmic rays much higher in energy than those we have already observed. I comment on the viability of the stochastic acceleration mechanism and the likely composition of cosmic rays accelerated in this way, based on our current understanding of the contents of the large-scale lobes of radio galaxies, and finally discuss the implications of stochastic lobe acceleration for the future of cosmic ray astronomy.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.titleWhich radio galaxies can make the highest energy cosmic rays?en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2010
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2010.16668.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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