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dc.contributor.authorEvans, D.A.
dc.contributor.authorKraft, R.P.
dc.contributor.authorWorrall, D.M.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorJones, C.
dc.contributor.authorForman, W.R.
dc.contributor.authorMurray, S.S.
dc.date.accessioned2011-12-19T15:01:30Z
dc.date.available2011-12-19T15:01:30Z
dc.date.issued2004-09
dc.identifier.citationEvans , D A , Kraft , R P , Worrall , D M , Hardcastle , M J , Jones , C , Forman , W R & Murray , S S 2004 , ' Chandra and XMM-Newton Observations of the Nucleus of Centaurus A ' The Astrophysical Journal , vol. 612 , pp. 786-796 .
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 180566
dc.identifier.otherPURE UUID: 9a53ab5b-d22b-4ba7-a0c4-083c48846faf
dc.identifier.otherdspace: 2299/198
dc.identifier.otherScopus: 7544234523
dc.identifier.urihttp://hdl.handle.net/2299/7336
dc.description.abstractWe present X-ray spectra of the nucleus of the nearby radio galaxy Centaurus A from observations with the XMM-Newton EPIC CCD cameras (two exposures separated by 12 months) and the Chandra HETGS. For the first time in an FR I type galaxy, we resolve fluorescent K emission from cold, neutral, or near-neutral iron at 6.4 keV, with an rms line width of 20 eV. The Fe line parameters observed are consistent with fluorescent emission from material at a large distance from the active galactic nucleus, either in the form of an absorber that nearly completely surrounds the central engine or a torus that lies predominantly out of the line of sight. Unresolved emission lines from neutral Si K at 1.74 keV and neutral S K at 2.30 keV are also detected. We find no evidence in the data for a previously reported 6.8 keV broadened Fe line. The continuum spectrum is well fitted with a combination of a heavily absorbed power-law component that we relate, using Bondi theory, to accretion phenomena in the form of a standard, geometrically thin, optically thick disk, and a second, less absorbed, power-law component that we associate with emission from the subparsec VLBI radio jet.en
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectAstronomy
dc.titleChandra and XMM-Newton Observations of the Nucleus of Centaurus Aen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstyperestrictedAccess


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