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dc.contributor.authorHardcastle, M.J.
dc.date.accessioned2007-12-17T09:51:38Z
dc.date.available2007-12-17T09:51:38Z
dc.date.issued2000
dc.identifier.citationHardcastle , M J 2000 , ' Determining the reality of x-ray filaments ' , Astronomy and Astrophysics , vol. 357 , pp. 884-890 .
dc.identifier.issn1432-0746
dc.identifier.otherPURE: 137994
dc.identifier.otherPURE UUID: ef553d13-a3fb-4fb5-99e7-1dc70481f931
dc.identifier.otherdspace: 2299/1191
dc.identifier.otherScopus: 0007465799
dc.identifier.urihttp://hdl.handle.net/2299/1191
dc.description.abstractA number of authors have reported filaments connecting bright structures in high-resolution X-ray images, and in some cases these have been taken as evidence for a physical connection between the structures, which might be thought to provide support for a model with non-cosmological redshifts. In this paper I point out two problems which are inherent in the interpretation of smoothed photon-limited data of this kind, and develop some simple techniques for the assessment of the reality of X-ray filaments, which can be applied to either simply smoothed or adaptively smoothed data. To illustrate the usefulness of these techniques, I apply them to archival ROSAT observations of galaxies and quasars previously analysed by others. I show that several reported filamentary structures connecting X-ray sources are not in fact significantly detected.en
dc.language.isoeng
dc.relation.ispartofAstronomy and Astrophysics
dc.titleDetermining the reality of x-ray filamentsen
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
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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