SIMBAD references

2000MNRAS.319..562H - Mon. Not. R. Astron. Soc., 319, 562-572 (2000/December-1)

The environments of FRII radio sources.

HARDCASTLE M.J. and WORRALL D.M.

Abstract (from CDS):

Using ROSAT observations, we estimate gas pressures in the X-ray-emitting medium surrounding 63 FRII radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. In the majority of cases (including 12/13 sources with modelled, spatially resolved X-ray emission) radio sources appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the internal energy density of the sources. We discuss possible departures from the minimum-energy condition and the consequences of our result for models of the dynamics of radio galaxies, in particular self-similar models.

Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: clusters: general - X-rays: galaxies

Status at CDS:  

Simbad objects: 65

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