dc.contributor.author | Hardcastle, M.J. | |
dc.date.accessioned | 2007-12-17T09:51:38Z | |
dc.date.available | 2007-12-17T09:51:38Z | |
dc.date.issued | 2000 | |
dc.identifier.citation | Hardcastle , M J 2000 , ' Determining the reality of x-ray filaments ' , Astronomy & Astrophysics , vol. 357 , pp. 884-890 . | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | dspace: 2299/1191 | |
dc.identifier.other | ORCID: /0000-0003-4223-1117/work/30391137 | |
dc.identifier.uri | http://hdl.handle.net/2299/1191 | |
dc.description.abstract | A 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.format.extent | 559919 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.title | Determining the reality of x-ray filaments | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | SPECS Deans Group | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |