title: The distribution of radio plasma in time and space.
abstract: The influence of jet-ejected plasma has been an important theme of this meeting; I draw attention to the prevalence of jet-ejected plasma, in particular that which has not been properly accounted for in the past. There are three strands to this paper: important emission which is prominent only at the lowest radio frequencies; relic radio plasma which must exist if even the most basic aspects of radio source evolutionary models are correct; and evidence that some 'radio-quiet' quasars could be FR-I radio sources.
authors.affiliation: Department of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, UK. kmb@astro.ox.ac.uk
authors.forename: Katherine M
authors.initials: KM
authors.lastname: Blundell
mesh_terms: D001256:Astronomy / Q000379:methods*; D005118:Extraterrestrial Environment; D008962:Models, Theoretical; D011827:Radiation; D013997:Time Factors