Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-05
New Astron.Rev. 47 (2003) 593-597
Astronomy and Astrophysics
Astrophysics
invited talk at "The Physics of Relativistic Jets in the CHANDRA and XMM Era", proceedings edited by G. Brunetti, D.E. Harris,
Scientific paper
10.1016/S1387-6473(03)00101-5
I demonstrate that radio observations in the literature to date of optically-selected quasars are largely inadequate to reveal the full extent of their jet-activity. I discuss a recent example of an optically-powerful quasar, which is radio-quiet according to all the standard classifications, which Blundell & Rawlings discovered to have a >100 kpc jet, and show that other than being the first FRI quasar to be identified, there is no reason to presume it is exceptional. I also discuss a possible new probe of accounting for the interactions of radio sources with their environments. This tool could help to avoid over-estimating magnetic fields strengths within cluster gas. I briefly describe recent analyses by Rudnick & Blundell which confront claims in the literature of cluster gas B-fields > 10 micro-G.
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