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dc.contributor.authorKonar, C.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorJamrozy, M.
dc.contributor.authorCroston, J.H.
dc.date.accessioned2013-06-13T10:45:47Z
dc.date.available2013-06-13T10:45:47Z
dc.date.issued2013-04-11
dc.identifier.citationKonar , C , Hardcastle , M J , Jamrozy , M & Croston , J H 2013 , ' Episodic radio galaxies J0116-4722 and J1158+2621 : Can we constrain the quiescent phase of nuclear activity? ' , Monthly Notices of the Royal Astronomical Society , vol. 430 , no. 3 , pp. 2137-2153 . https://doi.org/10.1093/mnras/stt040
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 1911415
dc.identifier.otherPURE UUID: 18763cb4-365b-4d34-b0a3-ea5307749c97
dc.identifier.otherScopus: 84876782514
dc.identifier.urihttp://hdl.handle.net/2299/10762
dc.description.abstractWe present multifrequency radio observations of two well-known episodic Fanaroff-Railey type II (FR II) radio galaxies (J0116-4722 and J1158+2621) and a detailed investigation of the life cycle of episodic radio galaxies from their spectral and radiative properties. Combining our previous work with the present results, we either constrain or place very good limits on the active and quiescent phases of a small sample of episodic FR II radio galaxies. The duration of the quiescent phase can be as small as the hotspot fading time of the previous episode, and as high as a few tens of Myr; however, for none of the sources in our sample is it close to the duration of the active phase of the previous episode. We also find that for many episodic radio galaxies, the nucleus is variable at radio wavelengths. For our small sample of seven episodic radio galaxies, we find four to have strongly variable cores, a much larger proportion than is generally found in samples of normal FR II radio galaxies. Studies with larger samples will be required to establish a statistical association between core variability and episodic radio activityen
dc.format.extent17
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.titleEpisodic radio galaxies J0116-4722 and J1158+2621 : Can we constrain the quiescent phase of nuclear activity?en
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2013-04-11
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stt040
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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