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dc.contributor.authorHardcastle, M.J.
dc.contributor.authorWorrall, D.M.
dc.date.accessioned2008-02-01T11:34:58Z
dc.date.available2008-02-01T11:34:58Z
dc.date.issued2001
dc.identifier.citationHardcastle , M J & Worrall , D M 2001 , The environments of FR II radio sources . in In: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250 . Astronomical Society of the Pacific , pp. 358-362 .
dc.identifier.isbn1-58381-090-0
dc.identifier.otherPURE: 179136
dc.identifier.otherPURE UUID: 2bfda1a5-cfca-4a60-8060-a4d0b3dcb1a1
dc.identifier.otherdspace: 2299/1504
dc.identifier.urihttp://hdl.handle.net/2299/1504
dc.descriptionOriginal paper can be found at: http://www.astrosociety.org/pubs/cs/222-252.html--Copyright Astronomical Society of the Pacific
dc.description.abstractUsing ROSAT observations, we estimate gas pressures in the X-ray-emitting media surrounding 63 FR II radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. The majority of the radio sources (including 12/13 sources with modelled, spatially resolved X-ray emission) appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the sources' internal energy densities. Some consequences of this result are discussed.en
dc.language.isoeng
dc.publisherAstronomical Society of the Pacific
dc.relation.ispartofIn: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250
dc.titleThe environments of FR II radio sourcesen
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
rioxxterms.typeOther
herts.preservation.rarelyaccessedtrue


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