Show simple item record

dc.contributor.authorEvans, D.A.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorLee, J.C.
dc.contributor.authorKraft, R.P.
dc.contributor.authorWorrall, D.M.
dc.contributor.authorBirkinshaw, M.
dc.contributor.authorCroston, J.H.
dc.identifier.citationEvans , D A , Hardcastle , M J , Lee , J C , Kraft , R P , Worrall , D M , Birkinshaw , M & Croston , J H 2008 , ' XMM-Newton Observations of the Nuclei of the Radio Galaxies 3C 305, DA 240, and 4C 73.08 ' , The Astrophysical Journal , vol. 688 , no. 2 , pp. 844-851 .
dc.identifier.otherdspace: 2299/2699
dc.identifier.otherORCID: /0000-0003-4223-1117/work/30391045
dc.descriptionOriginal article can be found at: Copyright American Astronomical Society [Full text of this article is not available in the UHRA]
dc.description.abstractWe present new XMM-Newton EPIC observations of the nuclei of the nearby radio galaxies 3C 305, DA 240, and 4C 73.08, and investigate the origin of their nuclear X-ray emission. The nuclei of the three sources appear to have different relative contributions of accretion- and jet-related X-ray emission, as expected based on earlier work. The X-ray spectrum of the FR II narrow-line radio galaxy (NLRG) 4C 73.08 is modeled with the sum of a heavily absorbed power law that we interpret to be associated with a luminous accretion disk and circumnuclear obscuring structure, and an unabsorbed power law that originates in an unresolved jet. This behavior is consistent with other narrow-line radio galaxies. The X-ray emission of the low-excitation FR II radio galaxy DA 240 is best modeled as an unabsorbed power law that we associate with a parsec-scale jet, similar to other low-excitation sources that we have studied previously. However, the X-ray nucleus of the narrow-line radio galaxy 3C 305 shows no evidence for the heavily absorbed X-ray emission that has been found in other NLRGs. It is possible that the nuclear optical spectrum in 3C 305 is intrinsically weak-lined, with the strong emission arising from extended regions that indicate the presence of jet-environment interactions. Our observations of 3C 305 suggest that this source is more closely related to other weak-lined radio galaxies. This ambiguity could extend to other sources currently classified as NLRGs. We also present XMM-Newton and VLA observations of the hot spot of DA 240, arguing that this is another detection of X-ray synchrotron emission from a low-luminosity hot spot.en
dc.relation.ispartofThe Astrophysical Journal
dc.titleXMM-Newton Observations of the Nuclei of the Radio Galaxies 3C 305, DA 240, and 4C 73.08en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSPECS Deans Group
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research (CAR)
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record