Show simple item record

dc.contributor.authorHardcastle, M.J.
dc.identifier.citationHardcastle , M J 2012 , Large-scale components of radio galaxies in gamma rays . in AIP Conference Proceedings . vol. 1505 , American Institute of Physics , pp. 72-79 , High Energy Gamma-Ray Astronomy , Heidelberg , Germany , 9/07/12 .
dc.identifier.otherPURE: 1911545
dc.identifier.otherPURE UUID: ae7b4ba0-5acd-4091-8c74-c57018b06259
dc.identifier.otherScopus: 84873207778
dc.description.abstractThe populations of relativistic electrons and high-energy cosmic rays in the extended components of radio-loud active galaxies-kiloparsec-scale jets, hotspots and lobes-make them, in principle, interesting sources of gamma-ray photons up to the highest (TeV) energies. Here I discuss the few detections of extended gamma-ray emission with Fermi and show what constraints they put on the physical conditions in radio galaxies. Although detections of radio galaxies at TeV energy are rare, I show that the information we do have can already put interesting constraints on radio galaxy physics: the CTA should have the sensitivity and resolution to improve this situation considerably, and to resolve the expected arcmin-scale gamma-ray jet in the nearest radio galaxy, Centaurus A. Finally, I review the connection between the gamma-ray observations and the acceleration of ultra-high-energy cosmic rays, and suggest that, while radio galaxies may well be the sources of the highest-energy cosmic rays observed, they may constitute a 'disappointing' population in the sense that only very nearby sources, such as Cen A, will ever be identified as discrete cosmic-ray sources.en
dc.publisherAmerican Institute of Physics
dc.relation.ispartofAIP Conference Proceedings
dc.titleLarge-scale components of radio galaxies in gamma raysen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.relation.schoolSchool of Physics, Astronomy and Mathematics

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record