The properties and environments of double-double radio galaxies

Details The properties and environments of double-double radio galaxies The properties and environments of double-double radio galaxies

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...31k&link_type=abstract

XMM-Newton Proposal ID #06012603

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, J0116-4722, J1158+2621, J1548-3216

Scientific paper

Double-double radio galaxies (DDRGs), in which two epochs of jet activity can be observed in a single object, are very important for investigating many aspects of radio-galaxy physics including particle content, source dynamics, environmental impact and duty cycles. We request XMM observations of 3 DDRGs, in order to detect inverse-Compton emission from their radio lobes and thermal emission from their surrounding hot-gas. This will allow us to measure both the internal pressure from the relativistic plasma, and external pressures acting on the outer lobes, which are no longer fed by the jets, and are expected to be in pressure balance. We can therefore investigate the presence of heavy particles in the outer lobes, which may be crucial for the inner lobe confinement.

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