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        The environments of FR II radio sources

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        901656.pdf (PDF, 416Kb)
        Author
        Hardcastle, M.J.
        Worrall, D.M.
        Attention
        2299/1504
        Abstract
        Using 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.
        Publication date
        2001
        Published in
        In: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250
        Other links
        http://hdl.handle.net/2299/1504
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